Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true and idempotentHint=true, and the description does not contradict these. It adds contextual value by noting the memory was 'saved earlier' and that it can clear 'sensitive data,' which reinforces the irreversible nature. It doesn't discuss missing-key behavior or return values, but given the annotations, this is sufficient.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.