Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must disclose behavioral traits, but it only states the action and format. It does not mention whether parameters are required, whether the report is returned or saved, whether it is a read-only operation, or any side effects. This leaves key behavioral aspects undisclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.