Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description adds significant behavioral context beyond the annotations (readOnlyHint, openWorldHint, destructiveHint): it explains the fusion search approach, RRF reranking toggle, full-text body size considerations, and the return structure (meta and results with scores, relationships, full_text). The annotations already indicate a safe, read-only operation, and the description aligns with and enriches that understanding.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.