Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate destructiveHint=true and readOnlyHint=false, so the description's 'Delete' action aligns without contradiction. It adds context about clearing sensitive data and stale context, going slightly beyond raw annotations. No explicit side effects mentioned, but annotations cover the destructive nature, so a 4 is appropriate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.