Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety and openness profile is covered. The description adds that results include disease-pathway flags and stable ids, which is useful, but says nothing about limits, pagination, or empty-result behavior beyond what the schema's limit parameter already implies.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.