Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description should disclose behavioral traits like return format, data freshness, or error handling. It only mentions 'Pay per call via x402' which is a billing note, not behavioral. No description of output structure or side effects.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.