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Title: docs: clarify client tool cancellation guidance by anhtnt90dev · Pull Request #2706 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: docs: clarify client tool cancellation guidance by anhtnt90dev · Pull Request #2706 · modelcontextprotocol/python-sdk

X Title: docs: clarify client tool cancellation guidance by anhtnt90dev · Pull Request #2706 · modelcontextprotocol/python-sdk

Description: Summary Clarify that server-side ctx.request_id is for correlation/protocol handlers, not a public cancellation handle for regular session.call_tool() calls. Point long-running cancellable client workflows to task-based cancellation with session.experimental.call_tool_as_task() and cancel_task(). Note that protocol-level CancelledNotification is for low-level clients that track their own in-flight request IDs. Closes #1410. Verification uv run --frozen mkdocs build --strict uv run --frozen python scripts/update_readme_snippets.py --check --readme README.v2.md pre-commit run markdownlint --files README.v2.md git diff --check

Open Graph Description: Summary Clarify that server-side ctx.request_id is for correlation/protocol handlers, not a public cancellation handle for regular session.call_tool() calls. Point long-running cancellable client ...

X Description: Summary Clarify that server-side ctx.request_id is for correlation/protocol handlers, not a public cancellation handle for regular session.call_tool() calls. Point long-running cancellable client ...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2706

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2424438 docs: clarify client tool cancellation guidance anhtnt90dev May 28, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2706/commits/242443890b737b6aa15ce20a9e7e1b5d5d0c189d
a88a687 docs: type cancellable tool snippet anhtnt90dev May 28, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2706/commits/a88a687b3bef2d53b041fb8a07eaf0b234971e29
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