Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full responsibility. It explicitly states 'permanently', 'irreversible', and 'GDPR Art. 17 erasure', which discloses the destructive, non-recoverable nature. It does not cover edge cases like non-existent cellId or authorization requirements, but it transparently conveys the primary behavioral trait.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.