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

enabled auto-merge (squash)

maxisbey added bug

improves spec compliance

P2

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maxisbey deleted the claude/fix-issue-1853-0cjKC branch

BabyChrist666 pushed a commit to BabyChrist666/python-sdk that referenced this pull request