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When an MCP Tool Needs a Missing Value: Elicitation vs Failing the Call

Quick answer: Elicitation lets an MCP server ask the client to collect a missing value from the user mid-call, instead of immediately failing or guessing. Use it when the tool genuinely needs a decision only the user can make, such as confirming a target environment or supplying a name. Do not use…

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  1. 2026-11-06 08:21 · DEV Community — AI
    When an MCP Tool Needs a Missing Value: Elicitation vs Failing the Call

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