Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnly, idempotent, non-destructive, closed-world behavior, so the bar is lower. The description still adds real context by disclosing that results are a bounded (paginated) page scoped to the connected tenant, though it says nothing about cursor lifetime, ordering, or what happens when the page is exhausted.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.