Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description adds substantial behavioral detail beyond the annotations: it explains that notes may stay live if a later batch asserts the same bytes, that only the last such batch retires them, what is preserved, what is reported, and that retirement uses the existing journal and trash. This is rich context for a destructive operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.