Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds useful context about what data comes back (delivery time, payment terms, add-on prices), but says nothing about pricing variability, staleness, currency, or error behavior for invalid products.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.