Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. 'Clear all' does convey that this is a destructive operation, but it does not disclose that the deletion is permanent, that it may be scoped to the current origin, or that there is no confirmation or undo. This is minimally transparent but not richly contextual.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.