Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full responsibility for behavioral disclosure. It states that the token's access scope determines the results, which clarifies authorization requirements, and 'List' implies a read-only operation. However, it does not discuss potential rate limits, pagination, or response size.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.