Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full responsibility for behavioral transparency, but it only restates the delete action. It does not disclose whether deletion is permanent, whether it has side effects on other widgets or pages, whether permissions are required, or what happens to dependent data.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.