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 only says 'Delete', which implies destruction, but does not state whether deletion is permanent, whether it cascades to dependent sources, what happens if the source is in use, or any authorization requirements. This is a significant gap 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.