Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description bears the full burden of disclosing behavior, but it only states 'batch apply effect' and adds the vague 'expanded operation'. It doesn't explain whether it operates on selected clips, whether it requires an effect name parameter, or what happens to existing effects. No safety or side-effect information is given.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.