Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
While destructiveHint=true already flags the destructive nature, the description adds valuable specifics: deletion is permanent, the URL stops serving immediately, and the document cannot be recovered. It also discloses the authentication requirement. No contradiction with annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.