Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden. It only implies a read operation and notes the results are 'ordered'; it says nothing about permissions, whether a profile must exist first, pagination, or the response shape. 'Ordered' is a small genuine behavioral detail, which lifts it above the bare minimum.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.