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 states the core action but does not mention side effects, whether the new track becomes selected, or whether it is added at the end of the track list. 'Add' implies non-destructive, but the description stops short of explaining any observable outcomes beyond the bare action.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.