Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the transparency burden. It does disclose that the output is a deep, cited industry report and that it is pay-per-use at 150 USDC on Base. However, it never describes the output format, data sources, or behavior when scope is omitted, and it claims input is optional while the schema marks it required.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.