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An MCP Server Is Not Interoperable Just Because It Connects

This story is from 2026-08-28. It is preserved in the archive; the latest stories are on the live feed.

An MCP handshake proves that two endpoints can start a session. It does not prove that an Agent can understand the tool, call it correctly, distinguish display text from machine-readable state, or know when to stop. I ran an independent test with FastMCP 3.4.7 as the client and WebAZ's public shopp…

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  1. 2026-08-28 07:34 · DEV Community — AI
    An MCP Server Is Not Interoperable Just Because It Connects

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