Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the burden of behavioral disclosure. It usefully discloses the $0.01 per-call cost, the x402 payment mechanism, and the fact that every response includes a provenance chain and Ed25519 attestation. The repeated attestation wording is slightly redundant but still informative.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is front-loaded with the core lookup purpose and remains short. However, it repeats the provenance-chain and attestation phrase in both sentences and names the agency twice, adding mild redundancy.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple two-parameter lookup, the description covers cost, payment behavior, and response attestation, which is helpful. Still, with no output schema it does not describe the returned record's fields, and it omits id format details, leaving the description adequate but not fully complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema already documents the payment parameter, while the description clarifies that 'id' is the record identifier. It does not explain the id format or where the identifier comes from, but for a single-id lookup this is acceptable.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the resource (Child Fatalities Trend data from HHS), the operation (retrieve one record by identifier), and the response style. It is specific enough to distinguish from unrelated lookup tools, though it does not explicitly contrast with sibling lookups.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Usage is implied: use this tool when you need a single Child Fatalities Trend record by its identifier and are willing to pay via x402. However, it gives no explicit when-to-use or when-not-to-use guidance relative to the many sibling lookup tools.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.