Add missing TasksCallCapability to enable proper MCP task support by maxisbey · Pull Request #1854 · modelcontextprotocol/python-sdk
The enable_tasks() method was creating TasksToolsCapability without the required nested call capability. This caused VS Code Copilot and other MCP clients to fail their capability detection check (tasks?.requests?.tools?.call !== undefined), silently falling back to synchronous tool calls instead of using the proper asynchronous MCP Tasks protocol. This fix: - Imports TasksCallCapability from mcp.types - Passes call=TasksCallCapability() when creating TasksToolsCapability - Adds unit test to verify the nested capability is properly set Without this fix, long-running tools would timeout after 5 minutes instead of receiving proper asynchronous task handling. Github-Issue: #1853
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Jan 14, 2026
maxisbey
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BabyChrist666 pushed a commit to BabyChrist666/python-sdk that referenced this pull request
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