Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden for behavioral disclosure. 'Remove effect by name' doesn't explain whether this is destructive, applies to one effect or all with the same name, requires a selected clip, or works on the current sequence. This is minimal for a mutating operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.