Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It states what information is returned but does not mention whether the operation is read-only, any side effects, permission requirements, or limitations. For a list operation this is a minor gap, but it leaves some ambiguity.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.