Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden of behavioral disclosure. It only says the playhead moves 'to edit,' without stating whether that means the next edit point, a previous one, or an edit under the playhead, and without clarifying whether anything else in the timeline changes or whether the action is reversible.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.