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by io.github.pipeworx-io
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Check Availability

check_availability
Read-onlyIdempotent

Check whether a name is available to register across MULTIPLE TLDs at once — the domain-hunting tool. Pass a base name ("acme") and get .com/.io/.ai/.co/.net/.org/.app/.dev checked in one call (or pass your own tlds list). For each: available true/false (+ expiration if taken). Use for "is X available", "find an open domain for my project", "which TLDs is X free on". Single-domain detail is domain_status; this is the bulk/brainstorm version.

Example tool call

This call uses example arguments supplied in the tool’s input schema.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "name": "acme"
    },
    "name": "check_availability"
  }
}

Input Schema

NameRequiredDescriptionDefault
nameYesBase name to check, e.g. "acme" (a full "acme.com" is also accepted — the label before the first dot is used).
tldsNoTLDs to check (without the dot), e.g. ["com","io","ai"]. Default: com, io, ai, co, net, org, app, dev. Max 15.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • addedInput schema / examples
      Added value: +[
+  {
+    "name": "acme"
+  },
+  {
+    "name": "nexus",
+    "tlds": [
+      "com",
+      "io",
+      "ai",
+      "dev"
+    ]
+  }
+]
  2. Added

TDQS

A4.4/5.0
Behavior4/5

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

Annotations already declare readOnly and idempotent. The description adds useful behavioral context: it checks multiple TLDs in one call, returns availability/expiration, accepts full domain input, and documents the default TLD list and max 15. No contradictions with annotations.

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

Conciseness4/5

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

The description is three sentences covering purpose, usage mechanics, and alternative. It is slightly long but every sentence contributes and the main purpose is front-loaded.

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

Completeness5/5

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

No output schema exists, but the description explains the return shape ('available true/false (+ expiration if taken)'), default behavior, and how it relates to sibling tools. Complete for a simple read-only lookup tool.

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?

Schema coverage is 100% and both parameters have detailed descriptions. The description reinforces the default TLD list and the base-name handling but adds little beyond the schema, so the baseline 3 is appropriate.

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

Purpose5/5

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

The description uses a specific verb+resource: 'Check whether a name is available to register across MULTIPLE TLDs at once'. It clearly distinguishes itself from domain_status by calling this 'the bulk/brainstorm version' and explicitly naming domain_status for single-domain detail.

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

Usage Guidelines5/5

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

Explicit use cases are listed: 'Use for "is X available"', 'find an open domain for my project', 'which TLDs is X free on'. It also provides a clear alternative: 'Single-domain detail is domain_status; this is the bulk/brainstorm version'.

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

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