Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the burden of behavioral disclosure. It discloses that the tool returns verifiable data, which implies a read-only operation, but does not elaborate on authorization, performance, or any side effects. This is adequate for a simple getter but not rich in behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.