Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It clearly states 'Deterministic database lookup — no LLM, no generation, sub-second,' which conveys predictable, fast, non-generative behavior. It also provides coverage statistics, giving a sense of limitations. However, it does not describe behavior for unmatched locations or potential error modes, which would make it fully transparent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.