feat(mcp): add readOnlyHint annotations to all MCP tools - #1013

Merged
msukkari merged 2 commits into
mainfrom
cursor/SOU-707-mcp-read-only-detection-ecd0
Mar 17, 2026
Merged

feat(mcp): add readOnlyHint annotations to all MCP tools#1013
msukkari merged 2 commits into
mainfrom
cursor/SOU-707-mcp-read-only-detection-ecd0

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@msukkarimsukkari commented Mar 17, 2026•
edited by coderabbitai Bot
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Summary

This PR adds readOnlyHint: true annotations to all MCP (Model Context Protocol) tools in Sourcebot. This enables compatibility with Cursor's Ask mode and other MCP clients that restrict tool usage based on whether tools modify their environment.

Problem

MCP tools in Sourcebot were not working in Cursor Ask mode because Cursor couldn't detect that our tools are read-only. According to the MCP specification, tools should include annotations to indicate their behavior characteristics.

Solution

Added readOnlyHint: true annotation to all 7 MCP tools in both implementations:

Built-in server (packages/web/src/features/mcp/server.ts):

  • search_code
  • list_commits
  • list_repos
  • read_file
  • list_tree
  • list_language_models
  • ask_codebase

Standalone npm package (packages/mcp/src/index.ts):

  • Same 7 tools

The readOnlyHint annotation is part of the MCP specification's ToolAnnotations interface and indicates that a tool does not modify its environment. All Sourcebot MCP tools are inherently read-only since they only query/read data.

Testing

  • Verified both packages build successfully
  • Confirmed all 7 tools in both implementations have the annotation
  • Verified the annotations are properly exposed when tools are listed via the MCP protocol

Fixes #SOU-707

Linear Issue: SOU-707

Open in WebOpen in Cursor

Summary by CodeRabbit

  • New Features

    • Added read-only annotations to MCP tools, enabling compatible clients to properly identify and handle read-only operations.

  • Documentation

    • Updated changelog documenting read-only tool annotations for enhanced client compatibility.

@cursoragent@msukkari
feat(mcp): add readOnlyHint annotations to all MCP tools
5e13b09
Mark all MCP tools as read-only using the MCP specification's
readOnlyHint annotation. This enables compatibility with Cursor's
Ask mode and other MCP clients that restrict tool usage based on
whether tools modify their environment.
All 7 tools (search_code, list_commits, list_repos, read_file,
list_tree, list_language_models, ask_codebase) are now annotated
with readOnlyHint: true in both the built-in web server and the
standalone npm package.
Fixes #SOU-707
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@coderabbitai

coderabbitaiBot commented Mar 17, 2026•
edited
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Caution

Review failed

The pull request is closed.

ℹ️ Recent review info
⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: fc14dc5d-d617-4c96-b66a-11b4ab2ab7f3

📥 Commits

Reviewing files that changed from the base of the PR and between 71f0ffc and 9c063ce.

📒 Files selected for processing (3)
  • CHANGELOG.md
  • packages/mcp/src/index.ts
  • packages/web/src/features/mcp/server.ts

Walkthrough

This PR adds read-only hint annotations to MCP tools across two implementation files and updates the changelog. Seven tools (search_code, list_commits, list_repos, read_file, list_tree, list_language_models, ask_codebase) are marked as read-only to support MCP clients that restrict tool usage based on behavior hints.

Changes

Cohort / File(s)Summary
Documentation
CHANGELOG.md		Added entry documenting the addition of readOnlyHint annotations to MCP tools for supporting Cursor Ask mode and other MCP clients.
MCP Server Tool Registration
packages/mcp/src/index.ts		Added { readOnlyHint: true } parameter to 7 tool registrations: search_code, list_commits, list_repos, read_file, list_tree, list_language_models, and ask_codebase.
Web MCP Server Tool Registration
packages/web/src/features/mcp/server.ts		Added annotations: { readOnlyHint: true } field to tool descriptors for the same 7 tools.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

Suggested reviewers

  • brendan-kellam
✨ Finishing Touches
📝 Generate docstrings
  • Create stacked PR
  • Commit on current branch
🧪 Generate unit tests (beta)
  • Create PR with unit tests
  • Commit unit tests in branch cursor/SOU-707-mcp-read-only-detection-ecd0
📝 Coding Plan
  • Generate coding plan for human review comments

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

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@cursoragent@msukkari
docs: add CHANGELOG entry for MCP read-only annotations
9c063ce
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@msukkari
msukkari marked this pull request as ready for review March 17, 2026 23:33
@msukkari
msukkari merged commit f69b613 into mainMar 17, 2026
8 of 9 checks passed
@msukkari
msukkari deleted the cursor/SOU-707-mcp-read-only-detection-ecd0 branch March 17, 2026 23:33
@github-actionsgithub-actionsBot mentioned this pull request Mar 17, 2026
Open
@coderabbitaicoderabbitaiBot mentioned this pull request Mar 18, 2026
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@msukkari@cursoragent
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
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}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
feat(mcp): add readOnlyHint annotations to all MCP tools - #1013
Merged
msukkari merged 2 commits into
mainfrom 
cursor/SOU-707-mcp-read-only-detection-ecd0
Mar 17, 2026
Merged
feat(mcp): add readOnlyHint annotations to all MCP tools#1013
msukkari merged 2 commits into
mainfrom 
cursor/SOU-707-mcp-read-only-detection-ecd0
Conversation
@msukkari
@msukkarimsukkari
commented
Mar 17, 2026•

edited by coderabbitai
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Summary
This PR adds readOnlyHint: true annotations to all MCP (Model Context Protocol) tools in Sourcebot. This enables compatibility with Cursor's Ask mode and other MCP clients that restrict tool usage based on whether tools modify their environment.
Problem
MCP tools in Sourcebot were not working in Cursor Ask mode because Cursor couldn't detect that our tools are read-only. According to the MCP specification, tools should include annotations to indicate their behavior characteristics.
Solution
Added readOnlyHint: true annotation to all 7 MCP tools in both implementations:
Built-in server (packages/web/src/features/mcp/server.ts):
  • search_code
  • list_commits
  • list_repos
  • read_file
  • list_tree
  • list_language_models
  • ask_codebase
Standalone npm package (packages/mcp/src/index.ts):
  • Same 7 tools
The readOnlyHint annotation is part of the MCP specification's ToolAnnotations interface and indicates that a tool does not modify its environment. All Sourcebot MCP tools are inherently read-only since they only query/read data.
Testing
  • Verified both packages build successfully
  • Confirmed all 7 tools in both implementations have the annotation
  • Verified the annotations are properly exposed when tools are listed via the MCP protocol
Fixes #SOU-707
Linear Issue: SOU-707
Open in WebOpen in Cursor
Summary by CodeRabbit
  • New Features
    • Added read-only annotations to MCP tools, enabling compatible clients to properly identify and handle read-only operations.
  • Documentation
    • Updated changelog documenting read-only tool annotations for enhanced client compatibility.
@cursoragent@msukkari
feat(mcp): add readOnlyHint annotations to all MCP tools
5e13b09
Mark all MCP tools as read-only using the MCP specification's
readOnlyHint annotation. This enables compatibility with Cursor's
Ask mode and other MCP clients that restrict tool usage based on
whether tools modify their environment.
All 7 tools (search_code, list_commits, list_repos, read_file,
list_tree, list_language_models, ask_codebase) are now annotated
with readOnlyHint: true in both the built-in web server and the
standalone npm package.
Fixes #SOU-707
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@coderabbitai
coderabbitaiBot
commented
Mar 17, 2026•

edited

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Caution
Review failed
The pull request is closed.
ℹ️ Recent review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
Run ID: fc14dc5d-d617-4c96-b66a-11b4ab2ab7f3
📥 Commits
Reviewing files that changed from the base of the PR and between 71f0ffc and 9c063ce.
📒 Files selected for processing (3)
  • CHANGELOG.md
  • packages/mcp/src/index.ts
  • packages/web/src/features/mcp/server.ts
Walkthrough
This PR adds read-only hint annotations to MCP tools across two implementation files and updates the changelog. Seven tools (search_code, list_commits, list_repos, read_file, list_tree, list_language_models, ask_codebase) are marked as read-only to support MCP clients that restrict tool usage based on behavior hints.
Changes
Cohort / File(s)Summary
Documentation
CHANGELOG.md		Added entry documenting the addition of readOnlyHint annotations to MCP tools for supporting Cursor Ask mode and other MCP clients.
MCP Server Tool Registration
packages/mcp/src/index.ts		Added { readOnlyHint: true } parameter to 7 tool registrations: search_code, list_commits, list_repos, read_file, list_tree, list_language_models, and ask_codebase.
Web MCP Server Tool Registration
packages/web/src/features/mcp/server.ts		Added annotations: { readOnlyHint: true } field to tool descriptors for the same 7 tools.
Estimated code review effort
🎯 1 (Trivial) | ⏱️ ~3 minutes
Possibly related PRs
Suggested reviewers
  • brendan-kellam
✨ Finishing Touches
📝 Generate docstrings
  •  Create stacked PR
  •  Commit on current branch
🧪 Generate unit tests (beta)
  •  Create PR with unit tests
  •  Commit unit tests in branch cursor/SOU-707-mcp-read-only-detection-ecd0
📝 Coding Plan
  •  Generate coding plan for human review comments
Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.
❤️ Share
Comment @coderabbitai help to get the list of available commands and usage tips.
Tip
You can make CodeRabbit's review stricter and more nitpicky using the `assertive` profile, if that's what you prefer.
Change the reviews.profile setting to assertive to make CodeRabbit's nitpick more issues in your PRs.
@cursoragent@msukkari
docs: add CHANGELOG entry for MCP read-only annotations
9c063ce
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@msukkari
msukkari
marked this pull request as ready for review
March 17, 2026 23:33
@msukkari
msukkari
merged commit f69b613
into
mainMar 17, 2026

8 of 9 checks passed

@msukkari
msukkari
deleted the

cursor/SOU-707-mcp-read-only-detection-ecd0

branch
March 17, 2026 23:33
@github-actionsgithub-actionsBot
mentioned this pull request
Mar 17, 2026

Open

@coderabbitaicoderabbitaiBot
mentioned this pull request
Mar 18, 2026
 Merged

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@msukkari@cursoragent

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
feat(mcp): add readOnlyHint annotations to all MCP tools - #1013
Merged
msukkari merged 2 commits into
mainfrom 
cursor/SOU-707-mcp-read-only-detection-ecd0
Mar 17, 2026
Merged
feat(mcp): add readOnlyHint annotations to all MCP tools#1013
msukkari merged 2 commits into
mainfrom 
cursor/SOU-707-mcp-read-only-detection-ecd0
Conversation
@msukkari
@msukkarimsukkari
commented
Mar 17, 2026•

edited by coderabbitai
Bot
Loading

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Contributor
Summary
This PR adds readOnlyHint: true annotations to all MCP (Model Context Protocol) tools in Sourcebot. This enables compatibility with Cursor's Ask mode and other MCP clients that restrict tool usage based on whether tools modify their environment.
Problem
MCP tools in Sourcebot were not working in Cursor Ask mode because Cursor couldn't detect that our tools are read-only. According to the MCP specification, tools should include annotations to indicate their behavior characteristics.
Solution
Added readOnlyHint: true annotation to all 7 MCP tools in both implementations:
Built-in server (packages/web/src/features/mcp/server.ts):
  • search_code
  • list_commits
  • list_repos
  • read_file
  • list_tree
  • list_language_models
  • ask_codebase
Standalone npm package (packages/mcp/src/index.ts):
  • Same 7 tools
The readOnlyHint annotation is part of the MCP specification's ToolAnnotations interface and indicates that a tool does not modify its environment. All Sourcebot MCP tools are inherently read-only since they only query/read data.
Testing
  • Verified both packages build successfully
  • Confirmed all 7 tools in both implementations have the annotation
  • Verified the annotations are properly exposed when tools are listed via the MCP protocol
Fixes #SOU-707
Linear Issue: SOU-707
Open in WebOpen in Cursor
Summary by CodeRabbit
  • New Features
    • Added read-only annotations to MCP tools, enabling compatible clients to properly identify and handle read-only operations.
  • Documentation
    • Updated changelog documenting read-only tool annotations for enhanced client compatibility.
@cursoragent@msukkari
feat(mcp): add readOnlyHint annotations to all MCP tools
5e13b09
Mark all MCP tools as read-only using the MCP specification's
readOnlyHint annotation. This enables compatibility with Cursor's
Ask mode and other MCP clients that restrict tool usage based on
whether tools modify their environment.
All 7 tools (search_code, list_commits, list_repos, read_file,
list_tree, list_language_models, ask_codebase) are now annotated
with readOnlyHint: true in both the built-in web server and the
standalone npm package.
Fixes #SOU-707
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@coderabbitai
coderabbitaiBot
commented
Mar 17, 2026•

edited

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Caution
Review failed
The pull request is closed.
ℹ️ Recent review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
Run ID: fc14dc5d-d617-4c96-b66a-11b4ab2ab7f3
📥 Commits
Reviewing files that changed from the base of the PR and between 71f0ffc and 9c063ce.
📒 Files selected for processing (3)
  • CHANGELOG.md
  • packages/mcp/src/index.ts
  • packages/web/src/features/mcp/server.ts
Walkthrough
This PR adds read-only hint annotations to MCP tools across two implementation files and updates the changelog. Seven tools (search_code, list_commits, list_repos, read_file, list_tree, list_language_models, ask_codebase) are marked as read-only to support MCP clients that restrict tool usage based on behavior hints.
Changes
Cohort / File(s)Summary
Documentation
CHANGELOG.md		Added entry documenting the addition of readOnlyHint annotations to MCP tools for supporting Cursor Ask mode and other MCP clients.
MCP Server Tool Registration
packages/mcp/src/index.ts		Added { readOnlyHint: true } parameter to 7 tool registrations: search_code, list_commits, list_repos, read_file, list_tree, list_language_models, and ask_codebase.
Web MCP Server Tool Registration
packages/web/src/features/mcp/server.ts		Added annotations: { readOnlyHint: true } field to tool descriptors for the same 7 tools.
Estimated code review effort
🎯 1 (Trivial) | ⏱️ ~3 minutes
Possibly related PRs
Suggested reviewers
  • brendan-kellam
✨ Finishing Touches
📝 Generate docstrings
  •  Create stacked PR
  •  Commit on current branch
🧪 Generate unit tests (beta)
  •  Create PR with unit tests
  •  Commit unit tests in branch cursor/SOU-707-mcp-read-only-detection-ecd0
📝 Coding Plan
  •  Generate coding plan for human review comments
Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.
❤️ Share
Comment @coderabbitai help to get the list of available commands and usage tips.
Tip
You can make CodeRabbit's review stricter and more nitpicky using the `assertive` profile, if that's what you prefer.
Change the reviews.profile setting to assertive to make CodeRabbit's nitpick more issues in your PRs.
@cursoragent@msukkari
docs: add CHANGELOG entry for MCP read-only annotations
9c063ce
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@msukkari
msukkari
marked this pull request as ready for review
March 17, 2026 23:33
@msukkari
msukkari
merged commit f69b613
into
mainMar 17, 2026

8 of 9 checks passed

@msukkari
msukkari
deleted the

cursor/SOU-707-mcp-read-only-detection-ecd0

branch
March 17, 2026 23:33
@github-actionsgithub-actionsBot
mentioned this pull request
Mar 17, 2026

Open

@coderabbitaicoderabbitaiBot
mentioned this pull request
Mar 18, 2026
 Merged

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2 participants

@msukkari@cursoragent

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
feat(mcp): add readOnlyHint annotations to all MCP tools - #1013
Merged
msukkari merged 2 commits into
mainfrom 
cursor/SOU-707-mcp-read-only-detection-ecd0
Mar 17, 2026
Merged
feat(mcp): add readOnlyHint annotations to all MCP tools#1013
msukkari merged 2 commits into
mainfrom 
cursor/SOU-707-mcp-read-only-detection-ecd0
Conversation
@msukkari
@msukkarimsukkari
commented
Mar 17, 2026•

edited by coderabbitai
Bot
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Contributor
Summary
This PR adds readOnlyHint: true annotations to all MCP (Model Context Protocol) tools in Sourcebot. This enables compatibility with Cursor's Ask mode and other MCP clients that restrict tool usage based on whether tools modify their environment.
Problem
MCP tools in Sourcebot were not working in Cursor Ask mode because Cursor couldn't detect that our tools are read-only. According to the MCP specification, tools should include annotations to indicate their behavior characteristics.
Solution
Added readOnlyHint: true annotation to all 7 MCP tools in both implementations:
Built-in server (packages/web/src/features/mcp/server.ts):
  • search_code
  • list_commits
  • list_repos
  • read_file
  • list_tree
  • list_language_models
  • ask_codebase
Standalone npm package (packages/mcp/src/index.ts):
  • Same 7 tools
The readOnlyHint annotation is part of the MCP specification's ToolAnnotations interface and indicates that a tool does not modify its environment. All Sourcebot MCP tools are inherently read-only since they only query/read data.
Testing
  • Verified both packages build successfully
  • Confirmed all 7 tools in both implementations have the annotation
  • Verified the annotations are properly exposed when tools are listed via the MCP protocol
Fixes #SOU-707
Linear Issue: SOU-707
Open in WebOpen in Cursor
Summary by CodeRabbit
  • New Features
    • Added read-only annotations to MCP tools, enabling compatible clients to properly identify and handle read-only operations.
  • Documentation
    • Updated changelog documenting read-only tool annotations for enhanced client compatibility.
@cursoragent@msukkari
feat(mcp): add readOnlyHint annotations to all MCP tools
5e13b09
Mark all MCP tools as read-only using the MCP specification's
readOnlyHint annotation. This enables compatibility with Cursor's
Ask mode and other MCP clients that restrict tool usage based on
whether tools modify their environment.
All 7 tools (search_code, list_commits, list_repos, read_file,
list_tree, list_language_models, ask_codebase) are now annotated
with readOnlyHint: true in both the built-in web server and the
standalone npm package.
Fixes #SOU-707
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@coderabbitai
coderabbitaiBot
commented
Mar 17, 2026•

edited

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Caution
Review failed
The pull request is closed.
ℹ️ Recent review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
Run ID: fc14dc5d-d617-4c96-b66a-11b4ab2ab7f3
📥 Commits
Reviewing files that changed from the base of the PR and between 71f0ffc and 9c063ce.
📒 Files selected for processing (3)
  • CHANGELOG.md
  • packages/mcp/src/index.ts
  • packages/web/src/features/mcp/server.ts
Walkthrough
This PR adds read-only hint annotations to MCP tools across two implementation files and updates the changelog. Seven tools (search_code, list_commits, list_repos, read_file, list_tree, list_language_models, ask_codebase) are marked as read-only to support MCP clients that restrict tool usage based on behavior hints.
Changes
Cohort / File(s)Summary
Documentation
CHANGELOG.md		Added entry documenting the addition of readOnlyHint annotations to MCP tools for supporting Cursor Ask mode and other MCP clients.
MCP Server Tool Registration
packages/mcp/src/index.ts		Added { readOnlyHint: true } parameter to 7 tool registrations: search_code, list_commits, list_repos, read_file, list_tree, list_language_models, and ask_codebase.
Web MCP Server Tool Registration
packages/web/src/features/mcp/server.ts		Added annotations: { readOnlyHint: true } field to tool descriptors for the same 7 tools.
Estimated code review effort
🎯 1 (Trivial) | ⏱️ ~3 minutes
Possibly related PRs
Suggested reviewers
  • brendan-kellam
✨ Finishing Touches
📝 Generate docstrings
  •  Create stacked PR
  •  Commit on current branch
🧪 Generate unit tests (beta)
  •  Create PR with unit tests
  •  Commit unit tests in branch cursor/SOU-707-mcp-read-only-detection-ecd0
📝 Coding Plan
  •  Generate coding plan for human review comments
Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.
❤️ Share
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@cursoragent@msukkari
docs: add CHANGELOG entry for MCP read-only annotations
9c063ce
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@msukkari
msukkari
marked this pull request as ready for review
March 17, 2026 23:33
@msukkari
msukkari
merged commit f69b613
into
mainMar 17, 2026

8 of 9 checks passed

@msukkari
msukkari
deleted the

cursor/SOU-707-mcp-read-only-detection-ecd0

branch
March 17, 2026 23:33
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@msukkari@cursoragent

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
feat(mcp): add readOnlyHint annotations to all MCP tools - #1013
Merged
msukkari merged 2 commits into
mainfrom 
cursor/SOU-707-mcp-read-only-detection-ecd0
Mar 17, 2026
Merged
feat(mcp): add readOnlyHint annotations to all MCP tools#1013
msukkari merged 2 commits into
mainfrom 
cursor/SOU-707-mcp-read-only-detection-ecd0
Conversation
@msukkari
@msukkarimsukkari
commented
Mar 17, 2026•

edited by coderabbitai
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Summary
This PR adds readOnlyHint: true annotations to all MCP (Model Context Protocol) tools in Sourcebot. This enables compatibility with Cursor's Ask mode and other MCP clients that restrict tool usage based on whether tools modify their environment.
Problem
MCP tools in Sourcebot were not working in Cursor Ask mode because Cursor couldn't detect that our tools are read-only. According to the MCP specification, tools should include annotations to indicate their behavior characteristics.
Solution
Added readOnlyHint: true annotation to all 7 MCP tools in both implementations:
Built-in server (packages/web/src/features/mcp/server.ts):
  • search_code
  • list_commits
  • list_repos
  • read_file
  • list_tree
  • list_language_models
  • ask_codebase
Standalone npm package (packages/mcp/src/index.ts):
  • Same 7 tools
The readOnlyHint annotation is part of the MCP specification's ToolAnnotations interface and indicates that a tool does not modify its environment. All Sourcebot MCP tools are inherently read-only since they only query/read data.
Testing
  • Verified both packages build successfully
  • Confirmed all 7 tools in both implementations have the annotation
  • Verified the annotations are properly exposed when tools are listed via the MCP protocol
Fixes #SOU-707
Linear Issue: SOU-707
Open in WebOpen in Cursor
Summary by CodeRabbit
  • New Features
    • Added read-only annotations to MCP tools, enabling compatible clients to properly identify and handle read-only operations.
  • Documentation
    • Updated changelog documenting read-only tool annotations for enhanced client compatibility.
@cursoragent@msukkari
feat(mcp): add readOnlyHint annotations to all MCP tools
5e13b09
Mark all MCP tools as read-only using the MCP specification's
readOnlyHint annotation. This enables compatibility with Cursor's
Ask mode and other MCP clients that restrict tool usage based on
whether tools modify their environment.
All 7 tools (search_code, list_commits, list_repos, read_file,
list_tree, list_language_models, ask_codebase) are now annotated
with readOnlyHint: true in both the built-in web server and the
standalone npm package.
Fixes #SOU-707
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@coderabbitai
coderabbitaiBot
commented
Mar 17, 2026•

edited

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Caution
Review failed
The pull request is closed.
ℹ️ Recent review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
Run ID: fc14dc5d-d617-4c96-b66a-11b4ab2ab7f3
📥 Commits
Reviewing files that changed from the base of the PR and between 71f0ffc and 9c063ce.
📒 Files selected for processing (3)
  • CHANGELOG.md
  • packages/mcp/src/index.ts
  • packages/web/src/features/mcp/server.ts
Walkthrough
This PR adds read-only hint annotations to MCP tools across two implementation files and updates the changelog. Seven tools (search_code, list_commits, list_repos, read_file, list_tree, list_language_models, ask_codebase) are marked as read-only to support MCP clients that restrict tool usage based on behavior hints.
Changes
Cohort / File(s)Summary
Documentation
CHANGELOG.md		Added entry documenting the addition of readOnlyHint annotations to MCP tools for supporting Cursor Ask mode and other MCP clients.
MCP Server Tool Registration
packages/mcp/src/index.ts		Added { readOnlyHint: true } parameter to 7 tool registrations: search_code, list_commits, list_repos, read_file, list_tree, list_language_models, and ask_codebase.
Web MCP Server Tool Registration
packages/web/src/features/mcp/server.ts		Added annotations: { readOnlyHint: true } field to tool descriptors for the same 7 tools.
Estimated code review effort
🎯 1 (Trivial) | ⏱️ ~3 minutes
Possibly related PRs
Suggested reviewers
  • brendan-kellam
✨ Finishing Touches
📝 Generate docstrings
  •  Create stacked PR
  •  Commit on current branch
🧪 Generate unit tests (beta)
  •  Create PR with unit tests
  •  Commit unit tests in branch cursor/SOU-707-mcp-read-only-detection-ecd0
📝 Coding Plan
  •  Generate coding plan for human review comments
Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.
❤️ Share
Comment @coderabbitai help to get the list of available commands and usage tips.
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You can make CodeRabbit's review stricter and more nitpicky using the `assertive` profile, if that's what you prefer.
Change the reviews.profile setting to assertive to make CodeRabbit's nitpick more issues in your PRs.
@cursoragent@msukkari
docs: add CHANGELOG entry for MCP read-only annotations
9c063ce
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@msukkari
msukkari
marked this pull request as ready for review
March 17, 2026 23:33
@msukkari
msukkari
merged commit f69b613
into
mainMar 17, 2026

8 of 9 checks passed

@msukkari
msukkari
deleted the

cursor/SOU-707-mcp-read-only-detection-ecd0

branch
March 17, 2026 23:33
@github-actionsgithub-actionsBot
mentioned this pull request
Mar 17, 2026

Open

@coderabbitaicoderabbitaiBot
mentioned this pull request
Mar 18, 2026
 Merged

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2 participants

@msukkari@cursoragent

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
feat(mcp): add readOnlyHint annotations to all MCP tools - #1013
Merged
msukkari merged 2 commits into
mainfrom 
cursor/SOU-707-mcp-read-only-detection-ecd0
Mar 17, 2026
Merged
feat(mcp): add readOnlyHint annotations to all MCP tools#1013
msukkari merged 2 commits into
mainfrom 
cursor/SOU-707-mcp-read-only-detection-ecd0
Conversation
@msukkari
@msukkarimsukkari
commented
Mar 17, 2026•

edited by coderabbitai
Bot
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Contributor
Summary
This PR adds readOnlyHint: true annotations to all MCP (Model Context Protocol) tools in Sourcebot. This enables compatibility with Cursor's Ask mode and other MCP clients that restrict tool usage based on whether tools modify their environment.
Problem
MCP tools in Sourcebot were not working in Cursor Ask mode because Cursor couldn't detect that our tools are read-only. According to the MCP specification, tools should include annotations to indicate their behavior characteristics.
Solution
Added readOnlyHint: true annotation to all 7 MCP tools in both implementations:
Built-in server (packages/web/src/features/mcp/server.ts):
  • search_code
  • list_commits
  • list_repos
  • read_file
  • list_tree
  • list_language_models
  • ask_codebase
Standalone npm package (packages/mcp/src/index.ts):
  • Same 7 tools
The readOnlyHint annotation is part of the MCP specification's ToolAnnotations interface and indicates that a tool does not modify its environment. All Sourcebot MCP tools are inherently read-only since they only query/read data.
Testing
  • Verified both packages build successfully
  • Confirmed all 7 tools in both implementations have the annotation
  • Verified the annotations are properly exposed when tools are listed via the MCP protocol
Fixes #SOU-707
Linear Issue: SOU-707
Open in WebOpen in Cursor
Summary by CodeRabbit
  • New Features
    • Added read-only annotations to MCP tools, enabling compatible clients to properly identify and handle read-only operations.
  • Documentation
    • Updated changelog documenting read-only tool annotations for enhanced client compatibility.
@cursoragent@msukkari
feat(mcp): add readOnlyHint annotations to all MCP tools
5e13b09
Mark all MCP tools as read-only using the MCP specification's
readOnlyHint annotation. This enables compatibility with Cursor's
Ask mode and other MCP clients that restrict tool usage based on
whether tools modify their environment.
All 7 tools (search_code, list_commits, list_repos, read_file,
list_tree, list_language_models, ask_codebase) are now annotated
with readOnlyHint: true in both the built-in web server and the
standalone npm package.
Fixes #SOU-707
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@coderabbitai
coderabbitaiBot
commented
Mar 17, 2026•

edited

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Caution
Review failed
The pull request is closed.
ℹ️ Recent review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
Run ID: fc14dc5d-d617-4c96-b66a-11b4ab2ab7f3
📥 Commits
Reviewing files that changed from the base of the PR and between 71f0ffc and 9c063ce.
📒 Files selected for processing (3)
  • CHANGELOG.md
  • packages/mcp/src/index.ts
  • packages/web/src/features/mcp/server.ts
Walkthrough
This PR adds read-only hint annotations to MCP tools across two implementation files and updates the changelog. Seven tools (search_code, list_commits, list_repos, read_file, list_tree, list_language_models, ask_codebase) are marked as read-only to support MCP clients that restrict tool usage based on behavior hints.
Changes
Cohort / File(s)Summary
Documentation
CHANGELOG.md		Added entry documenting the addition of readOnlyHint annotations to MCP tools for supporting Cursor Ask mode and other MCP clients.
MCP Server Tool Registration
packages/mcp/src/index.ts		Added { readOnlyHint: true } parameter to 7 tool registrations: search_code, list_commits, list_repos, read_file, list_tree, list_language_models, and ask_codebase.
Web MCP Server Tool Registration
packages/web/src/features/mcp/server.ts		Added annotations: { readOnlyHint: true } field to tool descriptors for the same 7 tools.
Estimated code review effort
🎯 1 (Trivial) | ⏱️ ~3 minutes
Possibly related PRs
Suggested reviewers
  • brendan-kellam
✨ Finishing Touches
📝 Generate docstrings
  •  Create stacked PR
  •  Commit on current branch
🧪 Generate unit tests (beta)
  •  Create PR with unit tests
  •  Commit unit tests in branch cursor/SOU-707-mcp-read-only-detection-ecd0
📝 Coding Plan
  •  Generate coding plan for human review comments
Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.
❤️ Share
Comment @coderabbitai help to get the list of available commands and usage tips.
Tip
You can make CodeRabbit's review stricter and more nitpicky using the `assertive` profile, if that's what you prefer.
Change the reviews.profile setting to assertive to make CodeRabbit's nitpick more issues in your PRs.
@cursoragent@msukkari
docs: add CHANGELOG entry for MCP read-only annotations
9c063ce
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@msukkari
msukkari
marked this pull request as ready for review
March 17, 2026 23:33
@msukkari
msukkari
merged commit f69b613
into
mainMar 17, 2026

8 of 9 checks passed

@msukkari
msukkari
deleted the

cursor/SOU-707-mcp-read-only-detection-ecd0

branch
March 17, 2026 23:33
@github-actionsgithub-actionsBot
mentioned this pull request
Mar 17, 2026

Open

@coderabbitaicoderabbitaiBot
mentioned this pull request
Mar 18, 2026
 Merged

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2 participants

@msukkari@cursoragent

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
feat(mcp): add readOnlyHint annotations to all MCP tools - #1013
Merged
msukkari merged 2 commits into
mainfrom 
cursor/SOU-707-mcp-read-only-detection-ecd0
Mar 17, 2026
Merged
feat(mcp): add readOnlyHint annotations to all MCP tools#1013
msukkari merged 2 commits into
mainfrom 
cursor/SOU-707-mcp-read-only-detection-ecd0
Conversation
@msukkari
@msukkarimsukkari
commented
Mar 17, 2026•

edited by coderabbitai
Bot
Loading

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Contributor
Summary
This PR adds readOnlyHint: true annotations to all MCP (Model Context Protocol) tools in Sourcebot. This enables compatibility with Cursor's Ask mode and other MCP clients that restrict tool usage based on whether tools modify their environment.
Problem
MCP tools in Sourcebot were not working in Cursor Ask mode because Cursor couldn't detect that our tools are read-only. According to the MCP specification, tools should include annotations to indicate their behavior characteristics.
Solution
Added readOnlyHint: true annotation to all 7 MCP tools in both implementations:
Built-in server (packages/web/src/features/mcp/server.ts):
  • search_code
  • list_commits
  • list_repos
  • read_file
  • list_tree
  • list_language_models
  • ask_codebase
Standalone npm package (packages/mcp/src/index.ts):
  • Same 7 tools
The readOnlyHint annotation is part of the MCP specification's ToolAnnotations interface and indicates that a tool does not modify its environment. All Sourcebot MCP tools are inherently read-only since they only query/read data.
Testing
  • Verified both packages build successfully
  • Confirmed all 7 tools in both implementations have the annotation
  • Verified the annotations are properly exposed when tools are listed via the MCP protocol
Fixes #SOU-707
Linear Issue: SOU-707
Open in WebOpen in Cursor
Summary by CodeRabbit
  • New Features
    • Added read-only annotations to MCP tools, enabling compatible clients to properly identify and handle read-only operations.
  • Documentation
    • Updated changelog documenting read-only tool annotations for enhanced client compatibility.
@cursoragent@msukkari
feat(mcp): add readOnlyHint annotations to all MCP tools
5e13b09
Mark all MCP tools as read-only using the MCP specification's
readOnlyHint annotation. This enables compatibility with Cursor's
Ask mode and other MCP clients that restrict tool usage based on
whether tools modify their environment.
All 7 tools (search_code, list_commits, list_repos, read_file,
list_tree, list_language_models, ask_codebase) are now annotated
with readOnlyHint: true in both the built-in web server and the
standalone npm package.
Fixes #SOU-707
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@coderabbitai
coderabbitaiBot
commented
Mar 17, 2026•

edited

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Caution
Review failed
The pull request is closed.
ℹ️ Recent review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
Run ID: fc14dc5d-d617-4c96-b66a-11b4ab2ab7f3
📥 Commits
Reviewing files that changed from the base of the PR and between 71f0ffc and 9c063ce.
📒 Files selected for processing (3)
  • CHANGELOG.md
  • packages/mcp/src/index.ts
  • packages/web/src/features/mcp/server.ts
Walkthrough
This PR adds read-only hint annotations to MCP tools across two implementation files and updates the changelog. Seven tools (search_code, list_commits, list_repos, read_file, list_tree, list_language_models, ask_codebase) are marked as read-only to support MCP clients that restrict tool usage based on behavior hints.
Changes
Cohort / File(s)Summary
Documentation
CHANGELOG.md		Added entry documenting the addition of readOnlyHint annotations to MCP tools for supporting Cursor Ask mode and other MCP clients.
MCP Server Tool Registration
packages/mcp/src/index.ts		Added { readOnlyHint: true } parameter to 7 tool registrations: search_code, list_commits, list_repos, read_file, list_tree, list_language_models, and ask_codebase.
Web MCP Server Tool Registration
packages/web/src/features/mcp/server.ts		Added annotations: { readOnlyHint: true } field to tool descriptors for the same 7 tools.
Estimated code review effort
🎯 1 (Trivial) | ⏱️ ~3 minutes
Possibly related PRs
Suggested reviewers
  • brendan-kellam
✨ Finishing Touches
📝 Generate docstrings
  •  Create stacked PR
  •  Commit on current branch
🧪 Generate unit tests (beta)
  •  Create PR with unit tests
  •  Commit unit tests in branch cursor/SOU-707-mcp-read-only-detection-ecd0
📝 Coding Plan
  •  Generate coding plan for human review comments
Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.
❤️ Share
Comment @coderabbitai help to get the list of available commands and usage tips.
Tip
You can make CodeRabbit's review stricter and more nitpicky using the `assertive` profile, if that's what you prefer.
Change the reviews.profile setting to assertive to make CodeRabbit's nitpick more issues in your PRs.
@cursoragent@msukkari
docs: add CHANGELOG entry for MCP read-only annotations
9c063ce
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@msukkari
msukkari
marked this pull request as ready for review
March 17, 2026 23:33
@msukkari
msukkari
merged commit f69b613
into
mainMar 17, 2026

8 of 9 checks passed

@msukkari
msukkari
deleted the

cursor/SOU-707-mcp-read-only-detection-ecd0

branch
March 17, 2026 23:33
@github-actionsgithub-actionsBot
mentioned this pull request
Mar 17, 2026

Open

@coderabbitaicoderabbitaiBot
mentioned this pull request
Mar 18, 2026
 Merged

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2 participants

@msukkari@cursoragent

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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feat(mcp): add readOnlyHint annotations to all MCP tools - #1013
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msukkari merged 2 commits into
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cursor/SOU-707-mcp-read-only-detection-ecd0
Mar 17, 2026
Merged
feat(mcp): add readOnlyHint annotations to all MCP tools#1013
msukkari merged 2 commits into
mainfrom 
cursor/SOU-707-mcp-read-only-detection-ecd0
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@msukkarimsukkari
commented
Mar 17, 2026•

edited by coderabbitai
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Summary
This PR adds readOnlyHint: true annotations to all MCP (Model Context Protocol) tools in Sourcebot. This enables compatibility with Cursor's Ask mode and other MCP clients that restrict tool usage based on whether tools modify their environment.
Problem
MCP tools in Sourcebot were not working in Cursor Ask mode because Cursor couldn't detect that our tools are read-only. According to the MCP specification, tools should include annotations to indicate their behavior characteristics.
Solution
Added readOnlyHint: true annotation to all 7 MCP tools in both implementations:
Built-in server (packages/web/src/features/mcp/server.ts):
  • search_code
  • list_commits
  • list_repos
  • read_file
  • list_tree
  • list_language_models
  • ask_codebase
Standalone npm package (packages/mcp/src/index.ts):
  • Same 7 tools
The readOnlyHint annotation is part of the MCP specification's ToolAnnotations interface and indicates that a tool does not modify its environment. All Sourcebot MCP tools are inherently read-only since they only query/read data.
Testing
  • Verified both packages build successfully
  • Confirmed all 7 tools in both implementations have the annotation
  • Verified the annotations are properly exposed when tools are listed via the MCP protocol
Fixes #SOU-707
Linear Issue: SOU-707
Open in WebOpen in Cursor
Summary by CodeRabbit
  • New Features
    • Added read-only annotations to MCP tools, enabling compatible clients to properly identify and handle read-only operations.
  • Documentation
    • Updated changelog documenting read-only tool annotations for enhanced client compatibility.
@cursoragent@msukkari
feat(mcp): add readOnlyHint annotations to all MCP tools
5e13b09
Mark all MCP tools as read-only using the MCP specification's
readOnlyHint annotation. This enables compatibility with Cursor's
Ask mode and other MCP clients that restrict tool usage based on
whether tools modify their environment.
All 7 tools (search_code, list_commits, list_repos, read_file,
list_tree, list_language_models, ask_codebase) are now annotated
with readOnlyHint: true in both the built-in web server and the
standalone npm package.
Fixes #SOU-707
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@coderabbitai
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Mar 17, 2026•

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Review failed
The pull request is closed.
ℹ️ Recent review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
Run ID: fc14dc5d-d617-4c96-b66a-11b4ab2ab7f3
📥 Commits
Reviewing files that changed from the base of the PR and between 71f0ffc and 9c063ce.
📒 Files selected for processing (3)
  • CHANGELOG.md
  • packages/mcp/src/index.ts
  • packages/web/src/features/mcp/server.ts
Walkthrough
This PR adds read-only hint annotations to MCP tools across two implementation files and updates the changelog. Seven tools (search_code, list_commits, list_repos, read_file, list_tree, list_language_models, ask_codebase) are marked as read-only to support MCP clients that restrict tool usage based on behavior hints.
Changes
Cohort / File(s)Summary
Documentation
CHANGELOG.md		Added entry documenting the addition of readOnlyHint annotations to MCP tools for supporting Cursor Ask mode and other MCP clients.
MCP Server Tool Registration
packages/mcp/src/index.ts		Added { readOnlyHint: true } parameter to 7 tool registrations: search_code, list_commits, list_repos, read_file, list_tree, list_language_models, and ask_codebase.
Web MCP Server Tool Registration
packages/web/src/features/mcp/server.ts		Added annotations: { readOnlyHint: true } field to tool descriptors for the same 7 tools.
Estimated code review effort
🎯 1 (Trivial) | ⏱️ ~3 minutes
Possibly related PRs
Suggested reviewers
  • brendan-kellam
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  •  Create stacked PR
  •  Commit on current branch
🧪 Generate unit tests (beta)
  •  Create PR with unit tests
  •  Commit unit tests in branch cursor/SOU-707-mcp-read-only-detection-ecd0
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  •  Generate coding plan for human review comments
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@cursoragent@msukkari
docs: add CHANGELOG entry for MCP read-only annotations
9c063ce
Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>
@msukkari
msukkari
marked this pull request as ready for review
March 17, 2026 23:33
@msukkari
msukkari
merged commit f69b613
into
mainMar 17, 2026

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@msukkari
msukkari
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cursor/SOU-707-mcp-read-only-detection-ecd0

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March 17, 2026 23:33
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Mar 18, 2026
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@msukkari@cursoragent