Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true and idempotentHint=true, which cover the core behavioral traits. The description adds the context that it clears 'sensitive data the agent saved earlier,' which is useful, but no additional side effects or limitations are disclosed. 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.