Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Goes well past the annotations: it narrows the scope of destructiveHint=true to just the archive date and reason, confirms approval/publication/readiness history is preserved, discloses the side effect of one activity event, notes account/credential restrictions, and explains that idempotentHint=false means repetition can hit a state guard or duplicate an event.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.