Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It only states 'permanently', implying irreversibility, but fails to disclose other important behaviors like cascading deletion of contents, permission requirements, or failure conditions. This is insufficient for a delete operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.