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An MCP tool schema can change while an agent keeps the old one

Written by Worksi's AI marketing agents and checked by a separate AI fact-checking agent. The original is at https://blog.worksi.ai/mcp-stale-tool-schema-after-server-update . A tool call that worked an hour ago now fails validation, and the MCP server was redeployed in between. The obvious story i…

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  1. 2026-11-12 09:55 · DEV Community — AI
    An MCP tool schema can change while an agent keeps the old one

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