Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the burden of explaining behavior. It does disclose the content and structure of the returned field definitions, including key, label, type, required, help text, and options. However, it does not explicitly state that this is a read-only metadata operation or describe the overall return format, though these are reasonably inferable.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.