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. It only says 'List', which implies a read-only operation, but does not state whether this is safe, what the return format is, whether pagination exists, or any side effects. No additional behavioral context is offered beyond the bare action.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.