Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the transparency burden. It discloses the core behavior (forking into collection) and a constraint (public skills only). However, it doesn't mention side effects (e.g., whether it overwrites an existing fork), nor does it describe the return value or error cases. This is a minimal but not completely absent transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.