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AgentPay Domain & Network Lookup

by io.github.noah-silver
OverviewDiscussionsAdmin

Domain & Network Lookup: Domain registration data (registrar, created/expires, status, nameservers) via RDAP.

lookup_whois
Read-only

Domain registration data (registrar, created/expires, status, nameservers) via RDAP. Costs $0.01 USDC per call (x402 or credits).

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "domain": "<domain>"
    },
    "name": "lookup_whois"
  }
}

Input Schema

NameRequiredDescriptionDefault
domainYesDomain name

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

B3.4/5.0
Behavior3/5

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds one genuinely useful non-annotation trait — the $0.01 USDC cost and payment paths (x402 or credits) — but says nothing about rate limits, failure behavior, or domains without RDAP records.

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

Conciseness5/5

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

Two tight sentences: the capability and its returned fields come first, the pricing caveat second. Nothing is padding and the front-loading is correct.

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

Completeness4/5

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

For a single-parameter read-only lookup with no output schema, the description covers the returned fields and the cost model, which is enough to call it correctly. The unresolved overlap with lookup_domain_report and the title's unexplained 'Network Lookup' phrasing (a separate lookup_ip exists) are the remaining gaps.

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

Parameters3/5

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

Only one parameter exists and schema description coverage is 100%, so the schema already documents 'domain'. The description adds no format detail (TLD requirements, IDN handling) beyond the schema, so baseline 3 applies.

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

Purpose4/5

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

The description names a specific resource — domain registration data (registrar, created/expires, status, nameservers) — and the retrieval mechanism, RDAP. However, it offers no differentiation from the closely related sibling lookup_domain_report, which an agent would need to distinguish between.

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

Usage Guidelines2/5

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

There is no guidance on when to use this tool versus lookup_domain_report, lookup_dns, or lookup_ip. The only supplementary sentence covers billing, not selection or preconditions.

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

All AgentPay Domain & Network Lookup toolsInspect
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