Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full responsibility for disclosing side effects, but it only states the action. It doesn't explain whether the removal is a ripple delete, whether it affects audio/video linked clips, whether it's undoable, or if there are safety confirmations. 'Expanded operation' is vague and unhelpful.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.