Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, which convey the safety profile. The description adds the rationale for deleting (sensitive data, stale context) but doesn't disclose additional behavioral details such as irreversibility or behavior on missing keys. This is adequate given annotation coverage.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.