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. 'Get cluster options' implies a read-only operation, but doesn't specify what kind of data is returned, whether there are any side effects, authentication requirements, rate limits, or error conditions. The description provides minimal behavioral context beyond the basic operation type.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.