Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the burden. It usefully discloses a real limitation ('This build matches text only'), which tells an agent there is no semantic matching, but says nothing about auth, rate limits, or how paging interacts across calls (beyond offset in the schema) — and an output schema covers return values.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.