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 states 'Delete' but does not indicate that the operation is permanent, whether it has dependencies, cascading effects, or requires specific permissions. The description adds minimal value beyond the tool's name.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.