Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations only mark the call as mutating, non-idempotent, and non-destructive, but the description adds substantial behavioral context: conditional publication on a correct answer, immediate URL return, recording-but-not-publishing on a wrong answer, model non-verification, URL/email stripping from free text, and per-token/per-hour rate limits. This goes far beyond the structured fields and is fully consistent with them — no contradiction.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.