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Verify domain

verify_domain
Destructive

Complete the fresh challenge from begin_ownership_claim using its private claim credentials. Checks the published proof and consumes the challenge once, returning the owner API key shown once. Public or legacy proof tokens alone cannot issue keys. Recovery replaces previous credentials and sessions. Rate limited: 10 attempts per domain per hour.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
domainYesA domain name such as example.com (no scheme, no path).
claim_idYes
claim_secretYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed4 schema fields changed
    • addedInput schema / properties / claim_id
      Added value: +{
      +  "maxLength": 100,
      +  "minLength": 1,
      +  "type": "string"
      +}
    • addedInput schema / properties / claim_secret
      Added value: +{
      +  "maxLength": 200,
      +  "minLength": 1,
      +  "type": "string"
      +}
    • changedInput schema / required
      Previous value: -[
      -  "domain"
      -]New value: +[
      +  "domain",
      +  "claim_id",
      +  "claim_secret"
      +]
    • changedOutput schema / anyOf
      Previous value: -[
      -  {
      -    "additionalProperties": false,
      -    "properties": {
      -      "api_key": {
      -        "type": "string"
      -      },
      -      "badge": {
      -        "additionalProperties": false,
      -        "properties": {
      -          "html": {
      -            "type": "string"
      -          },
      -          "markdown": {
      -            "type": "string"
      -          },
      -          "svg": {
      -            "type": "string"
      -          }
      -        },
      -        "required": [
      -          "svg",
      -          "html",
      -          "markdown"
      -        ],
      -        "type": "object"
      -      },
      -      "domain": {
      -        "type": "string"
      -      },
      -      "manage": {
      -        "type": "string"
      -      },
      -      "note": {
      -        "type": "string"
      -      },
      -      "notifications": {
      -        "type": "string"
      -      },
      -      "verified": {
      -        "const": true
      -      },
      -      "via": {
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "domain",
      -      "verified",
      -      "via",
      -      "api_key",
      -      "note",
      -      "manage",
      -      "badge",
      -      "notifications"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "additionalProperties": false,
      -    "properties": {
      -      "checked": {
      -        "additionalProperties": false,
      -        "properties": {
      -          "dns": {
      -            "type": "boolean"
      -          },
      -          "llms_txt": {
      -            "type": "boolean"
      -          },
      -          "meta": {
      -            "type": "boolean"
      -          },
      -          "well_known": {
      -            "type": "boolean"
      -          }
      -        },
      -        "required": [],
      -        "type": "object"
      -      },
      -      "domain": {
      -        "type": "string"
      -      },
      -      "hint": {
      -        "type": "string"
      -      },
      -      "verification": {
      -        "additionalProperties": false,
      -        "properties": {
      -          "domain": {
      -            "type": "string"
      -          },
      -          "methods": {
      -            "items": {
      -              "additionalProperties": false,
      -              "properties": {
      -                "description": {
      -                  "type": "string"
      -                },
      -                "method": {
      -                  "enum": [
      -                    "llms_txt",
      -                    "dns",
      -                    "meta",
      -                    "well_known"
      -                  ],
      -                  "type": "string"
      -                },
      -                "snippet": {
      -                  "type": "string"
      -                }
      -              },
      -              "required": [
      -                "method",
      -                "description",
      -                "snippet"
      -              ],
      -              "type": "object"
      -            },
      -            "type": "array"
      -          },
      -          "token": {
      -            "type": "string"
      -          },
      -          "verify_endpoint": {
      -            "type": "string"
      -          }
      -        },
      -        "required": [
      -          "domain",
      -          "token",
      -          "verify_endpoint",
      -          "methods"
      -        ],
      -        "type": "object"
      -      },
      -      "verified": {
      -        "const": false
      -      }
      -    },
      -    "required": [
      -      "domain",
      -      "verified",
      -      "checked",
      -      "hint",
      -      "verification"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "additionalProperties": true,
      -    "properties": {
      -      "detail": {
      -        "type": "string"
      -      },
      -      "domain": {
      -        "type": "string"
      -      },
      -      "error": {
      -        "type": "string"
      -      },
      -      "hint": {
      -        "type": "string"
      -      },
      -      "retry_after_seconds": {
      -        "type": "integer"
      -      }
      -    },
      -    "required": [
      -      "error"
      -    ],
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "additionalProperties": false,
      +    "properties": {
      +      "api_key": {
      +        "type": "string"
      +      },
      +      "badge": {
      +        "additionalProperties": false,
      +        "properties": {
      +          "html": {
      +            "type": "string"
      +          },
      +          "markdown": {
      +            "type": "string"
      +          },
      +          "svg": {
      +            "type": "string"
      +          }
      +        },
      +        "required": [
      +          "svg",
      +          "html",
      +          "markdown"
      +        ],
      +        "type": "object"
      +      },
      +      "domain": {
      +        "type": "string"
      +      },
      +      "manage": {
      +        "type": "string"
      +      },
      +      "note": {
      +        "type": "string"
      +      },
      +      "notifications": {
      +        "type": "string"
      +      },
      +      "verified": {
      +        "const": true
      +      },
      +      "via": {
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "domain",
      +      "verified",
      +      "via",
      +      "api_key",
      +      "note",
      +      "manage",
      +      "badge",
      +      "notifications"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": false,
      +    "properties": {
      +      "checked": {
      +        "additionalProperties": false,
      +        "properties": {
      +          "dns": {
      +            "type": "boolean"
      +          },
      +          "llms_txt": {
      +            "type": "boolean"
      +          },
      +          "meta": {
      +            "type": "boolean"
      +          },
      +          "well_known": {
      +            "type": "boolean"
      +          }
      +        },
      +        "required": [],
      +        "type": "object"
      +      },
      +      "domain": {
      +        "type": "string"
      +      },
      +      "hint": {
      +        "type": "string"
      +      },
      +      "verification": {
      +        "additionalProperties": false,
      +        "properties": {
      +          "claim_endpoint": {
      +            "type": "string"
      +          },
      +          "domain": {
      +            "type": "string"
      +          },
      +          "hint": {
      +            "type": "string"
      +          },
      +          "manage": {
      +            "type": "string"
      +          },
      +          "methods": {
      +            "items": {
      +              "additionalProperties": false,
      +              "properties": {
      +                "description": {
      +                  "type": "string"
      +                },
      +                "method": {
      +                  "enum": [
      +                    "llms_txt",
      +                    "dns",
      +                    "meta",
      +                    "well_known"
      +                  ],
      +                  "type": "string"
      +                },
      +                "snippet": {
      +                  "type": "string"
      +                }
      +              },
      +              "required": [
      +                "method",
      +                "description"
      +              ],
      +              "type": "object"
      +            },
      +            "type": "array"
      +          },
      +          "note": {
      +            "type": "string"
      +          },
      +          "token": {
      +            "type": "string"
      +          },
      +          "verify_endpoint": {
      +            "type": "string"
      +          }
      +        },
      +        "required": [
      +          "domain",
      +          "verify_endpoint",
      +          "methods"
      +        ],
      +        "type": "object"
      +      },
      +      "verified": {
      +        "const": false
      +      }
      +    },
      +    "required": [
      +      "domain",
      +      "verified",
      +      "checked",
      +      "hint",
      +      "verification"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": true,
      +    "properties": {
      +      "detail": {
      +        "type": "string"
      +      },
      +      "domain": {
      +        "type": "string"
      +      },
      +      "error": {
      +        "type": "string"
      +      },
      +      "hint": {
      +        "type": "string"
      +      },
      +      "retry_after_seconds": {
      +        "type": "integer"
      +      }
      +    },
      +    "required": [
      +      "error"
      +    ],
      +    "type": "object"
      +  }
      +]
  2. Changed3 schema fields changed
    • addedInput schema / properties / domain / maxLength
      Added value: +253
    • addedInput schema / properties / domain / minLength
      Added value: +1
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "anyOf": [
      +    {
      +      "additionalProperties": false,
      +      "properties": {
      +        "api_key": {
      +          "type": "string"
      +        },
      +        "badge": {
      +          "additionalProperties": false,
      +          "properties": {
      +            "html": {
      +              "type": "string"
      +            },
      +            "markdown": {
      +              "type": "string"
      +            },
      +            "svg": {
      +              "type": "string"
      +            }
      +          },
      +          "required": [
      +            "svg",
      +            "html",
      +            "markdown"
      +          ],
      +          "type": "object"
      +        },
      +        "domain": {
      +          "type": "string"
      +        },
      +        "manage": {
      +          "type": "string"
      +        },
      +        "note": {
      +          "type": "string"
      +        },
      +        "notifications": {
      +          "type": "string"
      +        },
      +        "verified": {
      +          "const": true
      +        },
      +        "via": {
      +          "type": "string"
      +        }
      +      },
      +      "required": [
      +        "domain",
      +        "verified",
      +        "via",
      +        "api_key",
      +        "note",
      +        "manage",
      +        "badge",
      +        "notifications"
      +      ],
      +      "type": "object"
      +    },
      +    {
      +      "additionalProperties": false,
      +      "properties": {
      +        "checked": {
      +          "additionalProperties": false,
      +          "properties": {
      +            "dns": {
      +              "type": "boolean"
      +            },
      +            "llms_txt": {
      +              "type": "boolean"
      +            },
      +            "meta": {
      +              "type": "boolean"
      +            },
      +            "well_known": {
      +              "type": "boolean"
      +            }
      +          },
      +          "required": [],
      +          "type": "object"
      +        },
      +        "domain": {
      +          "type": "string"
      +        },
      +        "hint": {
      +          "type": "string"
      +        },
      +        "verification": {
      +          "additionalProperties": false,
      +          "properties": {
      +            "domain": {
      +              "type": "string"
      +            },
      +            "methods": {
      +              "items": {
      +                "additionalProperties": false,
      +                "properties": {
      +                  "description": {
      +                    "type": "string"
      +                  },
      +                  "method": {
      +                    "enum": [
      +                      "llms_txt",
      +                      "dns",
      +                      "meta",
      +                      "well_known"
      +                    ],
      +                    "type": "string"
      +                  },
      +                  "snippet": {
      +                    "type": "string"
      +                  }
      +                },
      +                "required": [
      +                  "method",
      +                  "description",
      +                  "snippet"
      +                ],
      +                "type": "object"
      +              },
      +              "type": "array"
      +            },
      +            "token": {
      +              "type": "string"
      +            },
      +            "verify_endpoint": {
      +              "type": "string"
      +            }
      +          },
      +          "required": [
      +            "domain",
      +            "token",
      +            "verify_endpoint",
      +            "methods"
      +          ],
      +          "type": "object"
      +        },
      +        "verified": {
      +          "const": false
      +        }
      +      },
      +      "required": [
      +        "domain",
      +        "verified",
      +        "checked",
      +        "hint",
      +        "verification"
      +      ],
      +      "type": "object"
      +    },
      +    {
      +      "additionalProperties": true,
      +      "properties": {
      +        "detail": {
      +          "type": "string"
      +        },
      +        "domain": {
      +          "type": "string"
      +        },
      +        "error": {
      +          "type": "string"
      +        },
      +        "hint": {
      +          "type": "string"
      +        },
      +        "retry_after_seconds": {
      +          "type": "integer"
      +        }
      +      },
      +      "required": [
      +        "error"
      +      ],
      +      "type": "object"
      +    }
      +  ],
      +  "type": "object"
      +}
  3. First observed

TDQS

A4.5/5.0
Behavior5/5

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

Goes well beyond the annotations by disclosing single-use consumption of the challenge (non-idempotent), that the API key is shown only once, that recovery destroys prior credentials and sessions (matching destructiveHint), and an explicit rate limit of 10 attempts per domain per hour. This is exactly the behavioral context annotations cannot convey.

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?

Four dense sentences, all front-loaded with the action and dependency first, then consequences, then the rate limit. Every sentence carries non-redundant information; nothing is wasted.

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 destructive, credential-consuming mutation with an output schema covering return values, the description supplies the missing pieces: the prerequisite call, single-use semantics, credential replacement, and throttling. An agent has enough to invoke it correctly on the first try.

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 the domain parameter is documented in the schema (33% coverage). The description implies provenance for claim_id/claim_secret ('its private claim credentials' from begin_ownership_claim) and labels them private, which helps, but it never clarifies what claim_id identifies or the expected secret format, so it only partially compensates for the coverage gap.

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?

States a specific verb and resource ('Complete the fresh challenge from begin_ownership_claim') and names the sibling that produces the input, so an agent can place it in the ownership-claim flow without opening the schema. It also states the concrete outcome (returns the owner API key).

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

Usage Guidelines4/5

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

Clearly frames this as the second step after begin_ownership_claim and excludes alternatives: 'Public or legacy proof tokens alone cannot issue keys.' No explicit mention of when not to call it (e.g., an already-verified domain) or of the sibling verification_instructions, so it stops short of full routing guidance.

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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