Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral disclosure burden. It makes clear this is an informational enumeration of fields, not a mutation or submission, and specifies the exact structural content the agent should expect. It does not mention side-effect absence explicitly, but the wording implies a read-only lookup.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.