Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full behavioral burden, but it discloses nothing beyond the action itself. It does not say whether the operation permanently moves clip boundaries (destructive), whether it affects all transitions or just the nearest, what happens if no beat is detected, or what is returned. For a mutation-style tool, this is a significant gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.