Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It discloses the return content structure (full body and comments with specific fields), which is useful behavioral context. However, it doesn't mention potential errors, pagination, or authentication requirements, but for a simple getter, this is adequate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.