Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds useful operational context: the white-label import prerequisite, the required CabalSpy API key with a CabalSpy ID instance, and the absence of demo support. It does not add much about response trimming or pagination, but the output schema covers return shape.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.