Find better-scored alternatives to an x402 endpoint (paid)

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

With no annotations, the description fully discloses behavioral traits: pay-per-call cost (~$0.005), auto-pay behavior, similarity independence from latency/geography, and the fields returned. It does not mention error handling or auth details beyond wallet configuration, but covers major behavioral aspects.

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 a single, well-structured paragraph with no redundancy. It front-loads the core purpose and progressively adds details (use case, output fields, exclusions, pricing). Every sentence earns its place without verbosity.

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 no output schema, the description fully explains the return object (fields like score, grade, similarity, price, endpointPage URL). It covers purpose, parameters, usage, behavioral notes, and edge cases (empty array). An agent has sufficient information to invoke correctly.

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%, so baseline is 3. The description adds value by explaining how parameters are used (e.g., 'before paying' for resource, default limit, minScoreDelta threshold), and provides an example URL. This goes beyond the schema alone.

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 verb 'find' and resource 'better-scored alternatives to an x402 endpoint'. It specifies the action: given an endpoint URL, return semantically similar endpoints with higher trust scores. This distinguishes it from siblings like x402_trust_score (single score) and x402_trust_leaderboard (ranking), making the purpose unambiguous.

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?

Explicit usage guidance is provided: 'Use this to route away from a mediocre/dead/expensive endpoint... before paying, check if a higher-graded equivalent exists.' It also explains valid empty response and exclusions (same-host siblings, 'avoid'-flagged). Lacks direct comparison to sibling tools but the niche is clear.

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