Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true and readOnlyHint=false, so the destructive nature is covered. The description adds minimal context about the data being previously stored and sensitive data clearing, but doesn't go beyond what annotations and the verb 'delete' already imply. No contradiction.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.