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When an Agent Cancels an MCP Tool Call Midway: Cleaning Up the Upstream Request

Quick answer A tool call that an agent cancels is not the same as a request that never happened. By the time the MCP client sends a cancellation, the server may already have opened an upstream connection, started a long-running job, or written partial state. If the server treats cancellation as "dr…

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  1. 2026-11-03 07:43 · DEV Community — AI
    When an Agent Cancels an MCP Tool Call Midway: Cleaning Up the Upstream Request

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