Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations are absent, so the description carries the full burden. It states that the tool deletes a widget, but it does not disclose whether the deletion is permanent, if special permissions are required, or the consequences for the dashboard. No behavioral details beyond the basic mutation are provided.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.