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 the action but doesn't disclose whether it is read-only, the clip scope (selected clip vs all clips), or what information is returned (names, properties, etc.). 'Expanded operation' is unhelpful.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.