Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. The verb 'List' implies a read-only operation that returns a set of items, which is transparent for a simple zero-parameter tool. However, the qualifier 'main' is vague and does not explain filtering criteria or whether the result is exhaustive, leaving some ambiguity about the tool's exact behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.