Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden. It implies a read-only listing operation, which is clear. However, it does not mention potential behavior such as pagination, ordering, or what specific rule data is returned. For a simple list operation, it is adequate but lacks depth.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.