x402 trust score for an endpoint (paid)

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

With no annotations provided, the description thoroughly discloses behavioral traits: it returns a machine-readable verdict, price, confidence band, structured flags, unverified provider data, and latency caveats. It also mentions the pay-per-call behavior and auto-pay option.

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 somewhat long but every sentence adds value. It is well-structured, starting with the main output, then details, then usage notes, and is not wasteful.

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?

Given the complexity of the tool (multiple return fields, pricing, latency caveats) and no output schema, the description comprehensively covers the trust score, verdict, price, components, flags, stats, and limitations, making it 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?

Schema coverage is 100% for the single parameter. The description adds an example URL and explains that the parameter is the full x402 resource URL, which provides meaningful context beyond the schema's description.

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 tool evaluates a specific x402 endpoint and returns a trust score, verdict, price, and detailed flags. It distinguishes from siblings by specifying it's for a single endpoint (not bulk or leaderboard), using verbs like 'evaluate' and 'trust score'.

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?

The description explicitly advises calling this tool before paying an unknown endpoint to avoid fraud, and explains the pay-per-call model. It does not contrast with alternatives like x402_trust_bulk or x402_trust_preview, but the usage context is clear.

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