Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must fully disclose behavior. It only states that pages are retrieved with hierarchy and ordering, but does not explain pagination, whether it is read-only, authentication requirements, or any side effects. Critical behavioral traits like pagination (implied by parameters perPage and page) are not described.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.