audit.domains - Domain Valuation

Quote a domain purchase

quote_domain_purchase

Read-onlyIdempotent

Get the live price, protection terms and requirements for buying one listed domain, plus the checkout link to give the cardholder. Use read_for_sale_dns instead for a name that may not be listed here, and get_seller_listing for the seller's own view of a listing. Read-only. Never reveals the seller's floor and never evaluates an offer. Payment is a held card authorization on the seller's own account; the site brokers no sale. Only listed domains can be quoted.

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": "quote_domain_purchase"
  }
}

Input Schema

Name	Required	Description	Default
`domain`	Yes	The listed domain name to quote, such as example.com.

Output Schema

Name	Required	Description
`domain`	Yes
`escrow`	No
`verify`	No
`checkout`	No
`appraisal`	No	Null when listed by DNS.
`available`	Yes	False when the sale needs escrow, not card checkout.
`checkedAt`	No
`priceCents`	Yes
`protection`	No
`checkoutUrl`	Yes	Give this to the cardholder.
`acceptsOffers`	No
`buyerPaysCents`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedOct 6, 2026

changedInput schema / properties / domain / description

Previous value: -"A domain name such as example.com."New value: +"The listed domain name to quote, such as example.com."

addedOutput schema / properties

Added value: +{
+  "acceptsOffers": {
+    "type": "boolean"
+  },
+  "appraisal": {
+    "description": "Null when listed by DNS.",
+    "properties": {
+      "fairUsd": {
+        "type": "number"
+      },
+      "highUsd": {
+        "type": "number"
+      },
+      "lowUsd": {
+        "type": "number"
+      },
+      "priceToFairRatio": {
+        "type": "number"
+      }
+    },
+    "type": [
+      "object",
+      "null"
+    ]
+  },
+  "available": {
+    "description": "False when the sale needs escrow, not card checkout.",
+    "type": "boolean"
+  },
+  "buyerPaysCents": {
+    "type": "integer"
+  },
+  "checkedAt": {
+    "type": "string"
+  },
+  "checkout": {
+    "properties": {
+      "method": {
+        "type": "string"
+      },
+      "url": {
+        "type": "string"
+      }
+    },
+    "type": "object"
+  },
+  "checkoutUrl": {
+    "description": "Give this to the cardholder.",
+    "type": "string"
+  },
+  "domain": {
+    "type": "string"
+  },
+  "escrow": {
+    "type": [
+      "object",
+      "null"
+    ]
+  },
+  "priceCents": {
+    "type": "integer"
+  },
+  "protection": {
+    "properties": {
+      "autoReleaseCapCents": {
+        "type": "integer"
+      },
+      "holdDays": {
+        "type": "integer"
+      }
+    },
+    "type": "object"
+  },
+  "verify": {
+    "type": [
+      "object",
+      "null"
+    ]
+  }
+}

addedOutput schema / required

Added value: +[
+  "domain",
+  "available",
+  "priceCents",
+  "buyerPaysCents",
+  "checkoutUrl"
+]

First observedSep 30, 2026

TDQS

A4.4/5.0

Behavior4/5

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

Annotations already grant readOnlyHint/idempotentHint/destructiveHint=false, so the safety profile is covered, yet the description still adds real behavioral context: it never reveals the seller's floor, never evaluates an offer, and payment is a held card authorization on the seller's own account with the site brokering no sale. 'Read-only' is a mild restatement of readOnlyHint, keeping it just short of 5.

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?

Front-loaded with the payoff (price/terms/link) and then the routing and constraints, with no filler sentences. Slightly diluted by the redundant 'Read-only' clause that merely echoes the readOnlyHint annotation.

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?

For a single-parameter read tool with an output schema, the description covers everything an agent needs: what comes back, who is eligible, the payment mechanism, and which sibling to pick when the precondition fails. Return-value structure is correctly left to the output schema.

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, and schema coverage is 100% – the schema already documents 'domain' with an example. The description adds no format, TLD, or eligibility syntax beyond what the schema states, so the baseline 3 for full schema coverage applies.

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?

Specific verb (Quote/Get) plus resource (one listed domain) and an explicit enumeration of the returned payload: live price, protection terms, requirements, and checkout link. It also names two siblings (read_for_sale_dns, get_seller_listing) with the conditions that select them, so it is clearly separable from the rest of the toolset.

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 routing is given ('Use read_for_sale_dns instead for a name that may not be listed here, and get_seller_listing for the seller's own view') plus the hard precondition 'Only listed domains can be quoted.' When-to-use, when-to-use-something-else, and the eligibility limit are all stated.

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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