Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the burden of indicating safety and side effects. 'List' clearly implies a read-only operation with no destructive behavior, which is adequate for this simple tool. However, it does not disclose details such as return format, ordering, or permissions, which would add further transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.