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fastmcp tool func block asyncio

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

needs confirmationNeeds confirmation that the PR is actually required or needed.Needs confirmation that the PR is actually required or needed.

P2Moderate issues affecting some users, edge cases, potentially valuable featureModerate issues affecting some users, edge cases, potentially valuable feature

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.

#1839 In modelcontextprotocol/python-sdk;

· archever opened on Jan 7, 2026

Added descriptions for arguments taken from docstring

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

P2Moderate issues affecting some users, edge cases, potentially valuable featureModerate issues affecting some users, edge cases, potentially valuable feature

Status: Open (in progress).

modelcontextprotocol/python-sdknumber 1825

#1825 In modelcontextprotocol/python-sdk;

· Ilan-kayesar opened on Jan 4, 2026

Add custom content support to ToolError for isError responses

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

P3Nice to haves, rare edge casesNice to haves, rare edge cases

Status: Open (in progress).

modelcontextprotocol/python-sdknumber 1824

#1824 In modelcontextprotocol/python-sdk;

· hanzili opened on Jan 4, 2026

Added custom validator for Resource mime type which is less retrictiv…

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

P3Nice to haves, rare edge casesNice to haves, rare edge cases

Status: Open (in progress).

modelcontextprotocol/python-sdknumber 1819

#1819 In modelcontextprotocol/python-sdk;

· sighthon opened on Dec 31, 2025

Split _perform_authorization_code_grant code

authIssues and PRs related to Authentication / OAuthIssues and PRs related to Authentication / OAuth

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

P3Nice to haves, rare edge casesNice to haves, rare edge cases

Status: Open (in progress).

modelcontextprotocol/python-sdknumber 1815

#1815 In modelcontextprotocol/python-sdk;

· HenriChabert opened on Dec 24, 2025

feat(cmid-server): Implement Server-Side Support for Client ID Metadata Documents (CIMD)

authIssues and PRs related to Authentication / OAuthIssues and PRs related to Authentication / OAuth

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

P2Moderate issues affecting some users, edge cases, potentially valuable featureModerate issues affecting some users, edge cases, potentially valuable feature

Status: Open (in progress).

modelcontextprotocol/python-sdknumber 1810

#1810 In modelcontextprotocol/python-sdk;

· punitmahes opened on Dec 20, 2025

Make <code>errlog</code> optional in <code>stdio_client</code> and update default to <code>None</code>

breaking changeWill break existing deployments when updated without changesWill break existing deployments when updated without changes

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

P3Nice to haves, rare edge casesNice to haves, rare edge cases

Status: Open (in progress).

modelcontextprotocol/python-sdknumber 1807

#1807 In modelcontextprotocol/python-sdk;

· sesajad opened on Dec 19, 2025

More control over stderr in stdio client

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

P3Nice to haves, rare edge casesNice to haves, rare edge cases

ready for workEnough information for someone to start working onEnough information for someone to start working on

Status: Open.

#1806 In modelcontextprotocol/python-sdk;

· sesajad opened on Dec 19, 2025

add support for resource metadata

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

P2Moderate issues affecting some users, edge cases, potentially valuable featureModerate issues affecting some users, edge cases, potentially valuable feature

Status: Open (in progress).

modelcontextprotocol/python-sdknumber 1803

#1803 In modelcontextprotocol/python-sdk;

· mat-octave opened on Dec 18, 2025

Implement server-side support for Client ID Metadata Documents (CIMD)

authIssues and PRs related to Authentication / OAuthIssues and PRs related to Authentication / OAuth

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

P0Broken core functionality, security issues, critical missing featureBroken core functionality, security issues, critical missing feature

ready for workEnough information for someone to start working onEnough information for someone to start working on

Status: Open.

#1801 In modelcontextprotocol/python-sdk;

· maxisbey opened on Dec 18, 2025

Consider extensible pattern for protocol flow-control exceptions

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

P2Moderate issues affecting some users, edge cases, potentially valuable featureModerate issues affecting some users, edge cases, potentially valuable feature

ready for workEnough information for someone to start working onEnough information for someone to start working on

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.

#1788 In modelcontextprotocol/python-sdk;

· felixweinberger opened on Dec 15, 2025

Proposal: Split Server class into MCPCore (handler management) (tentative name) and Server (runtime)

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

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.

#1779 In modelcontextprotocol/python-sdk;

· sreenaths opened on Dec 11, 2025