Tool definition
The structured description of a callable function an assistant can invoke: name, parameters, return shape, and a description the model reads to decide when to call it. The description is doing more work than most authors realise.
Terms this definition uses
Machine files
The files addressed to machines rather than readers, and what publishing one does and does not buy.
llms.txt · llms-full.txt · agents.md · entity map · entity map parity · machine layer · well-known URI · MCP · agent card · sitemap index · OpenAPI specification · ai.txt · SKILL.md · sitemap origin error · soft 404 on a machine file · tdmrep.json · TDM exception · security.txt
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