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 discloses an important safety behavior: it refuses to overwrite a scene open in another inactive tab, and clarifies the save-as option. However, it does not mention what happens on success, whether it overwrites the current file when no path is given, or any error conditions, leaving some gaps in transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.