Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already state destructiveHint=true and readOnlyHint=false, so the destructive nature is covered. The description adds the useful ownership scope ('your posts') but does not disclose permanence, side effects on replies or reposts, or failure behavior. It does not contradict the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.