Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It discloses the verification semantics (hash recompute against the sealed value, anchor folding) and implies a read-only check, but never states side effects, permissions, or that it is non-mutating. Reasonable but not rich 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.