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Low-level Server API publishes inputSchema in tools/list but does not enforce it on tools/call

Status: Open.

#2628In modelcontextprotocol/typescript-sdk;

· Ahmad-Faraj opened on Aug 9, 2026

Docs: passing z.object() as inputSchema on v1 fails silently (empty schema) or cryptically (tools/list crash) — not covered in troubleshooting or migration guide

Status: Open.

#2627In modelcontextprotocol/typescript-sdk;

· giacomomaria81 opened on Aug 9, 2026

Tor

Status: Open.

#2624In modelcontextprotocol/typescript-sdk;

· baezvb6-alt opened on Aug 8, 2026

oauthMetadataResponse requires a full AS metadata document to read one field from it

Status: Open.

#2623In modelcontextprotocol/typescript-sdk;

· quotentiroler opened on Aug 7, 2026

McpServer constructor capabilities.tools.listChanged is silently overridden by setToolRequestHandlers()

Status: Open.

#2622In modelcontextprotocol/typescript-sdk;

· javydreamercsw opened on Aug 7, 2026

[v2] versionNegotiation: 2xx server/discover response with an empty or unparseable body fails connect() instead of falling back to legacy initialize

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2619In modelcontextprotocol/typescript-sdk;

· claude opened on Aug 6, 2026

[v2] Legacy Streamable HTTP reconnects continue after the client request times out

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2615In modelcontextprotocol/typescript-sdk;

· teamleaderleo opened on Aug 5, 2026

Client.listTools() corrupts its cached tool metadata when an output schema fails to compile

Status: Open.

#2614In modelcontextprotocol/typescript-sdk;

· sebthom opened on Aug 4, 2026

Client.callTool() throws -32602 after tools/list_changed replaces an in-flight call's output schema

Status: Open.

#2612In modelcontextprotocol/typescript-sdk;

· sebthom opened on Aug 4, 2026

createMcpHandler: reused McpServer instance grows an unbounded onclose chain — memory leak, then uncatchable RangeError after ~20k requests

Status: Open.

#2607In modelcontextprotocol/typescript-sdk;

· blakebauman opened on Aug 2, 2026

Memory leak: AjvJsonSchemaValidator.getValidator() recompiles schemas without $id on every call

Status: Open.

#2605In modelcontextprotocol/typescript-sdk;

· UberBlackCat opened on Aug 2, 2026

CODEOWNERS auth paths do not resolve on main, so the auth team is never auto-requested

Status: Open.

#2604In modelcontextprotocol/typescript-sdk;

· conorbronsdon opened on Aug 2, 2026