Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations only declare readOnlyHint and openWorldHint, so the description carries the rest and does so well: it discloses the detection method, the confidence-scored output with its evidence (matching fees, block index, adjacency), and the Solana/Jito scope limit. It doesn't mention latency, rate limits, or coverage caveats (e.g., tokens with no Jito bundles).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.