Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden for behavioral disclosure. It only states what the tool does (retrieves settings) without mentioning any behavioral traits: no information about permissions required, rate limits, whether this is a read-only operation (implied but not stated), response format, error conditions, or whether it works on live vs. preview environments (though the 'preview' parameter hints at this). The description adds minimal value beyond the basic function.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.