Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Goes beyond readOnlyHint=true by disclosing the return payload (claim, its hash, the opBNB transaction once sealed), the pre-charge refusal on missing claims, and the cost of 1 cent per call. Pricing and failure behavior are exactly the kind of context annotations cannot carry.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.