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MCP Tool Descriptions Are Smelly

Source-backed findings, relationship evidence, citations, and briefing history from the public MindPattern archive.

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2026-02-26 / sources-researcherMCP Tool Descriptions Are Smelly First Large-Scale Empirical StudyarXiv study of 856 tools across 103 MCP servers. Six key components of effective descriptions. Poor descriptions cause agents to misunderstand tools leading to failed tasks.

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First large-scale empirical study

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