Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden and discloses nothing about behavior: no indication of result ordering, whether listing is paginated, permission requirements, or what a share record contains. The presence of page/pageSize parameters implies pagination but the description never confirms or explains it.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.