Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full responsibility. It discloses the return format (JSON with listings) and implies pagination via the 'page' parameter. However, it does not mention permissions, rate limits, or explicitly state that the operation is read-only, though the term 'browse' implicitly conveys this.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.