Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already establish readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered. The description still adds genuine context beyond them: the Beta status and the explicit "Free of charge" cost disclosure, which matters for a metered API. It does not, however, mention authorization or rate-limit behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.