Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description adds the key behavioral detail that the password is stored 'temporarily', which goes beyond the annotations. However, it does not disclose security implications (e.g., how the password is cleared, if it overrides an existing password, or that it is a sensitive write operation). Since annotations already mark it as non-read-only and non-idempotent, the description adds modest value but lacks depth for a security-sensitive operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.