Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full responsibility for disclosing behavior. It simply states the action but does not explicitly indicate that it is a read-only operation, mention potential output format, or note any side effects or performance considerations. The minimal wording provides minimal transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.