Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so the description adds value by detailing what data is returned (commodity, capacity, certifications, markets). No contradictions. It does not mention rate limits or pagination, but overall transparent about the tool's read-only nature and open-world assumption.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.