Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It states 'Delete' which implies destructiveness, but it does not disclose consequences such as whether the deletion is permanent, disconnects clients, or requires specific permissions. This is a minimal level of transparency 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.