Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Beyond annotations (destructiveHint=true), the description discloses exactly what gets destroyed: ALL analytics data, every event and annotation. It also adds the irreversible nature and the owner-confirmation requirement, giving the agent critical safety context not present in annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.