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Merchant Evidence Badge

verified_merchant_json_badge
Read-only

Signed merchant evidence with expiry and public verification key: proves HirePulse issued it, not ownership or safety. No third-party certification. $0.005 per result. Risk evidence: pre_purchase_merchant_trust_check; API checks: x402_merchant_trust_check.

Input Schema

NameRequiredDescriptionDefault
domainYesPublic domain without scheme, path or port.
contextNoOptional. A few words on why you are calling this tool. Recorded without your identity to improve the tools; leave out personal data.

Output Schema

NameRequiredDescriptionDefault
codeNo
domainNo
statusNo
sandboxNo
signalsNo
latency_msNo
risk_levelNo
limitationsNo
safe_to_buyNo
trust_scoreNo
error_reasonNo
organizationNo
recommendationNo
signed_statementNo
verification_keyNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changed
    • removedOutput schema / anyOf
      Removed value: -[
      -  {
      -    "description": "Only status=ok is charged. Diagnostic results may omit result fields; unknown facts are null.",
      -    "properties": {
      -      "domain": {
      -        "type": "string"
      -      },
      -      "error_reason": {
      -        "type": "string"
      -      },
      -      "latency_ms": {
      -        "minimum": 0,
      -        "type": "integer"
      -      },
      -      "limitations": {
      -        "items": {
      -          "type": "string"
      -        },
      -        "type": "array"
      -      },
      -      "organization": {
      -        "type": "object"
      -      },
      -      "recommendation": {
      -        "type": "string"
      -      },
      -      "risk_level": {
      -        "enum": [
      -          "LOW",
      -          "MEDIUM",
      -          "HIGH",
      -          "CRITICAL"
      -        ],
      -        "type": "string"
      -      },
      -      "safe_to_buy": {
      -        "type": "boolean"
      -      },
      -      "sandbox": {
      -        "additionalProperties": false,
      -        "properties": {
      -          "demo_domain": {
      -            "const": true,
      -            "type": "boolean"
      -          },
      -          "note": {
      -            "type": "string"
      -          }
      -        },
      -        "required": [
      -          "demo_domain",
      -          "note"
      -        ],
      -        "type": "object"
      -      },
      -      "signals": {
      -        "properties": {
      -          "active_ad_campaigns": {
      -            "type": [
      -              "boolean",
      -              "null"
      -            ]
      -          },
      -          "domain_age_days": {
      -            "type": [
      -              "number",
      -              "null"
      -            ]
      -          },
      -          "has_active_employees": {
      -            "type": [
      -              "boolean",
      -              "null"
      -            ]
      -          },
      -          "legitimate_tech_stack": {
      -            "type": [
      -              "boolean",
      -              "null"
      -            ]
      -          },
      -          "onchain_reputation_score": {
      -            "type": [
      -              "number",
      -              "null"
      -            ]
      -          },
      -          "open_jobs_count": {
      -            "type": [
      -              "number",
      -              "null"
      -            ]
      -          }
      -        },
      -        "required": [
      -          "domain_age_days",
      -          "has_active_employees",
      -          "open_jobs_count",
      -          "legitimate_tech_stack",
      -          "active_ad_campaigns",
      -          "onchain_reputation_score"
      -        ],
      -        "type": "object"
      -      },
      -      "signed_statement": {
      -        "type": "string"
      -      },
      -      "status": {
      -        "enum": [
      -          "ok",
      -          "no_data",
      -          "unreachable"
      -        ],
      -        "type": "string"
      -      },
      -      "trust_score": {
      -        "maximum": 100,
      -        "minimum": 0,
      -        "type": "number"
      -      },
      -      "verification_key": {
      -        "type": "object"
      -      }
      -    },
      -    "required": [
      -      "domain",
      -      "status"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "additionalProperties": true,
      -    "properties": {
      -      "code": {
      -        "minLength": 1,
      -        "type": "string"
      -      },
      -      "status": {
      -        "maximum": 599,
      -        "minimum": 400,
      -        "type": "integer"
      -      }
      -    },
      -    "required": [
      -      "status",
      -      "code"
      -    ],
      -    "type": "object"
      -  }
      -]
    • addedOutput schema / description
      Added value: +"Fields only; full schema in GET /v1/catalog."
    • addedOutput schema / properties
      Added value: +{
      +  "code": {},
      +  "domain": {},
      +  "error_reason": {},
      +  "latency_ms": {},
      +  "limitations": {},
      +  "organization": {},
      +  "recommendation": {},
      +  "risk_level": {},
      +  "safe_to_buy": {},
      +  "sandbox": {},
      +  "signals": {},
      +  "signed_statement": {},
      +  "status": {},
      +  "trust_score": {},
      +  "verification_key": {}
      +}
  2. Changed3 schema fields changed
    • addedOutput schema / anyOf
      Added value: +[
      +  {
      +    "description": "Only status=ok is charged. Diagnostic results may omit result fields; unknown facts are null.",
      +    "properties": {
      +      "domain": {
      +        "type": "string"
      +      },
      +      "error_reason": {
      +        "type": "string"
      +      },
      +      "latency_ms": {
      +        "minimum": 0,
      +        "type": "integer"
      +      },
      +      "limitations": {
      +        "items": {
      +          "type": "string"
      +        },
      +        "type": "array"
      +      },
      +      "organization": {
      +        "type": "object"
      +      },
      +      "recommendation": {
      +        "type": "string"
      +      },
      +      "risk_level": {
      +        "enum": [
      +          "LOW",
      +          "MEDIUM",
      +          "HIGH",
      +          "CRITICAL"
      +        ],
      +        "type": "string"
      +      },
      +      "safe_to_buy": {
      +        "type": "boolean"
      +      },
      +      "sandbox": {
      +        "additionalProperties": false,
      +        "properties": {
      +          "demo_domain": {
      +            "const": true,
      +            "type": "boolean"
      +          },
      +          "note": {
      +            "type": "string"
      +          }
      +        },
      +        "required": [
      +          "demo_domain",
      +          "note"
      +        ],
      +        "type": "object"
      +      },
      +      "signals": {
      +        "properties": {
      +          "active_ad_campaigns": {
      +            "type": [
      +              "boolean",
      +              "null"
      +            ]
      +          },
      +          "domain_age_days": {
      +            "type": [
      +              "number",
      +              "null"
      +            ]
      +          },
      +          "has_active_employees": {
      +            "type": [
      +              "boolean",
      +              "null"
      +            ]
      +          },
      +          "legitimate_tech_stack": {
      +            "type": [
      +              "boolean",
      +              "null"
      +            ]
      +          },
      +          "onchain_reputation_score": {
      +            "type": [
      +              "number",
      +              "null"
      +            ]
      +          },
      +          "open_jobs_count": {
      +            "type": [
      +              "number",
      +              "null"
      +            ]
      +          }
      +        },
      +        "required": [
      +          "domain_age_days",
      +          "has_active_employees",
      +          "open_jobs_count",
      +          "legitimate_tech_stack",
      +          "active_ad_campaigns",
      +          "onchain_reputation_score"
      +        ],
      +        "type": "object"
      +      },
      +      "signed_statement": {
      +        "type": "string"
      +      },
      +      "status": {
      +        "enum": [
      +          "ok",
      +          "no_data",
      +          "unreachable"
      +        ],
      +        "type": "string"
      +      },
      +      "trust_score": {
      +        "maximum": 100,
      +        "minimum": 0,
      +        "type": "number"
      +      },
      +      "verification_key": {
      +        "type": "object"
      +      }
      +    },
      +    "required": [
      +      "domain",
      +      "status"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": true,
      +    "properties": {
      +      "code": {
      +        "minLength": 1,
      +        "type": "string"
      +      },
      +      "status": {
      +        "maximum": 599,
      +        "minimum": 400,
      +        "type": "integer"
      +      }
      +    },
      +    "required": [
      +      "status",
      +      "code"
      +    ],
      +    "type": "object"
      +  }
      +]
    • removedOutput schema / description
      Removed value: -"Fields only; full schema in GET /v1/catalog."
    • removedOutput schema / properties
      Removed value: -{
      -  "code": {},
      -  "domain": {},
      -  "error_reason": {},
      -  "latency_ms": {},
      -  "limitations": {},
      -  "organization": {},
      -  "recommendation": {},
      -  "risk_level": {},
      -  "safe_to_buy": {},
      -  "sandbox": {},
      -  "signals": {},
      -  "signed_statement": {},
      -  "status": {},
      -  "trust_score": {},
      -  "verification_key": {}
      -}
  3. Changed3 schema fields changed
    • removedOutput schema / anyOf
      Removed value: -[
      -  {
      -    "description": "Only status=ok is charged. Diagnostic results may omit result fields; unknown facts are null.",
      -    "properties": {
      -      "domain": {
      -        "type": "string"
      -      },
      -      "error_reason": {
      -        "type": "string"
      -      },
      -      "latency_ms": {
      -        "minimum": 0,
      -        "type": "integer"
      -      },
      -      "limitations": {
      -        "items": {
      -          "type": "string"
      -        },
      -        "type": "array"
      -      },
      -      "organization": {
      -        "type": "object"
      -      },
      -      "recommendation": {
      -        "type": "string"
      -      },
      -      "risk_level": {
      -        "enum": [
      -          "LOW",
      -          "MEDIUM",
      -          "HIGH",
      -          "CRITICAL"
      -        ],
      -        "type": "string"
      -      },
      -      "safe_to_buy": {
      -        "type": "boolean"
      -      },
      -      "sandbox": {
      -        "additionalProperties": false,
      -        "properties": {
      -          "demo_domain": {
      -            "const": true,
      -            "type": "boolean"
      -          },
      -          "note": {
      -            "type": "string"
      -          }
      -        },
      -        "required": [
      -          "demo_domain",
      -          "note"
      -        ],
      -        "type": "object"
      -      },
      -      "signals": {
      -        "properties": {
      -          "active_ad_campaigns": {
      -            "type": [
      -              "boolean",
      -              "null"
      -            ]
      -          },
      -          "domain_age_days": {
      -            "type": [
      -              "number",
      -              "null"
      -            ]
      -          },
      -          "has_active_employees": {
      -            "type": [
      -              "boolean",
      -              "null"
      -            ]
      -          },
      -          "legitimate_tech_stack": {
      -            "type": [
      -              "boolean",
      -              "null"
      -            ]
      -          },
      -          "onchain_reputation_score": {
      -            "type": [
      -              "number",
      -              "null"
      -            ]
      -          },
      -          "open_jobs_count": {
      -            "type": [
      -              "number",
      -              "null"
      -            ]
      -          }
      -        },
      -        "required": [
      -          "domain_age_days",
      -          "has_active_employees",
      -          "open_jobs_count",
      -          "legitimate_tech_stack",
      -          "active_ad_campaigns",
      -          "onchain_reputation_score"
      -        ],
      -        "type": "object"
      -      },
      -      "signed_statement": {
      -        "type": "string"
      -      },
      -      "status": {
      -        "enum": [
      -          "ok",
      -          "no_data",
      -          "unreachable"
      -        ],
      -        "type": "string"
      -      },
      -      "trust_score": {
      -        "maximum": 100,
      -        "minimum": 0,
      -        "type": "number"
      -      },
      -      "verification_key": {
      -        "type": "object"
      -      }
      -    },
      -    "required": [
      -      "domain",
      -      "status"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "additionalProperties": true,
      -    "properties": {
      -      "code": {
      -        "minLength": 1,
      -        "type": "string"
      -      },
      -      "status": {
      -        "maximum": 599,
      -        "minimum": 400,
      -        "type": "integer"
      -      }
      -    },
      -    "required": [
      -      "status",
      -      "code"
      -    ],
      -    "type": "object"
      -  }
      -]
    • addedOutput schema / description
      Added value: +"Fields only; full schema in GET /v1/catalog."
    • addedOutput schema / properties
      Added value: +{
      +  "code": {},
      +  "domain": {},
      +  "error_reason": {},
      +  "latency_ms": {},
      +  "limitations": {},
      +  "organization": {},
      +  "recommendation": {},
      +  "risk_level": {},
      +  "safe_to_buy": {},
      +  "sandbox": {},
      +  "signals": {},
      +  "signed_statement": {},
      +  "status": {},
      +  "trust_score": {},
      +  "verification_key": {}
      +}
  4. Changed1 schema field changed
    • changedOutput schema / anyOf
      Previous value: -[
      -  {
      -    "description": "Only status=ok is charged. Diagnostic results may omit result fields; unknown facts are null.",
      -    "properties": {
      -      "domain": {
      -        "type": "string"
      -      },
      -      "error_reason": {
      -        "type": "string"
      -      },
      -      "latency_ms": {
      -        "minimum": 0,
      -        "type": "integer"
      -      },
      -      "limitations": {
      -        "items": {
      -          "type": "string"
      -        },
      -        "type": "array"
      -      },
      -      "organization": {
      -        "type": "object"
      -      },
      -      "recommendation": {
      -        "type": "string"
      -      },
      -      "risk_level": {
      -        "enum": [
      -          "LOW",
      -          "MEDIUM",
      -          "HIGH",
      -          "CRITICAL"
      -        ],
      -        "type": "string"
      -      },
      -      "safe_to_buy": {
      -        "type": "boolean"
      -      },
      -      "signals": {
      -        "properties": {
      -          "active_ad_campaigns": {
      -            "type": [
      -              "boolean",
      -              "null"
      -            ]
      -          },
      -          "domain_age_days": {
      -            "type": [
      -              "number",
      -              "null"
      -            ]
      -          },
      -          "has_active_employees": {
      -            "type": [
      -              "boolean",
      -              "null"
      -            ]
      -          },
      -          "legitimate_tech_stack": {
      -            "type": [
      -              "boolean",
      -              "null"
      -            ]
      -          },
      -          "onchain_reputation_score": {
      -            "type": [
      -              "number",
      -              "null"
      -            ]
      -          },
      -          "open_jobs_count": {
      -            "type": [
      -              "number",
      -              "null"
      -            ]
      -          }
      -        },
      -        "required": [
      -          "domain_age_days",
      -          "has_active_employees",
      -          "open_jobs_count",
      -          "legitimate_tech_stack",
      -          "active_ad_campaigns",
      -          "onchain_reputation_score"
      -        ],
      -        "type": "object"
      -      },
      -      "signed_statement": {
      -        "type": "string"
      -      },
      -      "status": {
      -        "enum": [
      -          "ok",
      -          "no_data",
      -          "unreachable"
      -        ],
      -        "type": "string"
      -      },
      -      "trust_score": {
      -        "maximum": 100,
      -        "minimum": 0,
      -        "type": "number"
      -      },
      -      "verification_key": {
      -        "type": "object"
      -      }
      -    },
      -    "required": [
      -      "domain",
      -      "status"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "additionalProperties": true,
      -    "properties": {
      -      "code": {
      -        "minLength": 1,
      -        "type": "string"
      -      },
      -      "status": {
      -        "maximum": 599,
      -        "minimum": 400,
      -        "type": "integer"
      -      }
      -    },
      -    "required": [
      -      "status",
      -      "code"
      -    ],
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "description": "Only status=ok is charged. Diagnostic results may omit result fields; unknown facts are null.",
      +    "properties": {
      +      "domain": {
      +        "type": "string"
      +      },
      +      "error_reason": {
      +        "type": "string"
      +      },
      +      "latency_ms": {
      +        "minimum": 0,
      +        "type": "integer"
      +      },
      +      "limitations": {
      +        "items": {
      +          "type": "string"
      +        },
      +        "type": "array"
      +      },
      +      "organization": {
      +        "type": "object"
      +      },
      +      "recommendation": {
      +        "type": "string"
      +      },
      +      "risk_level": {
      +        "enum": [
      +          "LOW",
      +          "MEDIUM",
      +          "HIGH",
      +          "CRITICAL"
      +        ],
      +        "type": "string"
      +      },
      +      "safe_to_buy": {
      +        "type": "boolean"
      +      },
      +      "sandbox": {
      +        "additionalProperties": false,
      +        "properties": {
      +          "demo_domain": {
      +            "const": true,
      +            "type": "boolean"
      +          },
      +          "note": {
      +            "type": "string"
      +          }
      +        },
      +        "required": [
      +          "demo_domain",
      +          "note"
      +        ],
      +        "type": "object"
      +      },
      +      "signals": {
      +        "properties": {
      +          "active_ad_campaigns": {
      +            "type": [
      +              "boolean",
      +              "null"
      +            ]
      +          },
      +          "domain_age_days": {
      +            "type": [
      +              "number",
      +              "null"
      +            ]
      +          },
      +          "has_active_employees": {
      +            "type": [
      +              "boolean",
      +              "null"
      +            ]
      +          },
      +          "legitimate_tech_stack": {
      +            "type": [
      +              "boolean",
      +              "null"
      +            ]
      +          },
      +          "onchain_reputation_score": {
      +            "type": [
      +              "number",
      +              "null"
      +            ]
      +          },
      +          "open_jobs_count": {
      +            "type": [
      +              "number",
      +              "null"
      +            ]
      +          }
      +        },
      +        "required": [
      +          "domain_age_days",
      +          "has_active_employees",
      +          "open_jobs_count",
      +          "legitimate_tech_stack",
      +          "active_ad_campaigns",
      +          "onchain_reputation_score"
      +        ],
      +        "type": "object"
      +      },
      +      "signed_statement": {
      +        "type": "string"
      +      },
      +      "status": {
      +        "enum": [
      +          "ok",
      +          "no_data",
      +          "unreachable"
      +        ],
      +        "type": "string"
      +      },
      +      "trust_score": {
      +        "maximum": 100,
      +        "minimum": 0,
      +        "type": "number"
      +      },
      +      "verification_key": {
      +        "type": "object"
      +      }
      +    },
      +    "required": [
      +      "domain",
      +      "status"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": true,
      +    "properties": {
      +      "code": {
      +        "minLength": 1,
      +        "type": "string"
      +      },
      +      "status": {
      +        "maximum": 599,
      +        "minimum": 400,
      +        "type": "integer"
      +      }
      +    },
      +    "required": [
      +      "status",
      +      "code"
      +    ],
      +    "type": "object"
      +  }
      +]
  5. Changed1 schema field changed
    • changedInput schema / properties / domain / examples
      Previous value: -[
      -  "example.com"
      -]New value: +[
      +  "allbirds.com"
      +]
  6. Changed1 schema field changed
    • addedInput schema / properties / context
      Added value: +{
      +  "description": "Optional. A few words on why you are calling this tool. Recorded without your identity to improve the tools; leave out personal data.",
      +  "type": "string"
      +}
  7. Changed4 schema fields changed
    • addedOutput schema / anyOf
      Added value: +[
      +  {
      +    "description": "Only status=ok is charged. Diagnostic results may omit result fields; unknown facts are null.",
      +    "properties": {
      +      "domain": {
      +        "type": "string"
      +      },
      +      "error_reason": {
      +        "type": "string"
      +      },
      +      "latency_ms": {
      +        "minimum": 0,
      +        "type": "integer"
      +      },
      +      "limitations": {
      +        "items": {
      +          "type": "string"
      +        },
      +        "type": "array"
      +      },
      +      "organization": {
      +        "type": "object"
      +      },
      +      "recommendation": {
      +        "type": "string"
      +      },
      +      "risk_level": {
      +        "enum": [
      +          "LOW",
      +          "MEDIUM",
      +          "HIGH",
      +          "CRITICAL"
      +        ],
      +        "type": "string"
      +      },
      +      "safe_to_buy": {
      +        "type": "boolean"
      +      },
      +      "signals": {
      +        "properties": {
      +          "active_ad_campaigns": {
      +            "type": [
      +              "boolean",
      +              "null"
      +            ]
      +          },
      +          "domain_age_days": {
      +            "type": [
      +              "number",
      +              "null"
      +            ]
      +          },
      +          "has_active_employees": {
      +            "type": [
      +              "boolean",
      +              "null"
      +            ]
      +          },
      +          "legitimate_tech_stack": {
      +            "type": [
      +              "boolean",
      +              "null"
      +            ]
      +          },
      +          "onchain_reputation_score": {
      +            "type": [
      +              "number",
      +              "null"
      +            ]
      +          },
      +          "open_jobs_count": {
      +            "type": [
      +              "number",
      +              "null"
      +            ]
      +          }
      +        },
      +        "required": [
      +          "domain_age_days",
      +          "has_active_employees",
      +          "open_jobs_count",
      +          "legitimate_tech_stack",
      +          "active_ad_campaigns",
      +          "onchain_reputation_score"
      +        ],
      +        "type": "object"
      +      },
      +      "signed_statement": {
      +        "type": "string"
      +      },
      +      "status": {
      +        "enum": [
      +          "ok",
      +          "no_data",
      +          "unreachable"
      +        ],
      +        "type": "string"
      +      },
      +      "trust_score": {
      +        "maximum": 100,
      +        "minimum": 0,
      +        "type": "number"
      +      },
      +      "verification_key": {
      +        "type": "object"
      +      }
      +    },
      +    "required": [
      +      "domain",
      +      "status"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": true,
      +    "properties": {
      +      "code": {
      +        "minLength": 1,
      +        "type": "string"
      +      },
      +      "status": {
      +        "maximum": 599,
      +        "minimum": 400,
      +        "type": "integer"
      +      }
      +    },
      +    "required": [
      +      "status",
      +      "code"
      +    ],
      +    "type": "object"
      +  }
      +]
    • removedOutput schema / description
      Removed value: -"Only status=ok is charged. Diagnostic results may omit result fields; unknown facts are null."
    • removedOutput schema / properties
      Removed value: -{
      -  "domain": {
      -    "type": "string"
      -  },
      -  "error_reason": {
      -    "type": "string"
      -  },
      -  "latency_ms": {
      -    "minimum": 0,
      -    "type": "integer"
      -  },
      -  "limitations": {
      -    "items": {
      -      "type": "string"
      -    },
      -    "type": "array"
      -  },
      -  "organization": {
      -    "type": "object"
      -  },
      -  "recommendation": {
      -    "type": "string"
      -  },
      -  "risk_level": {
      -    "enum": [
      -      "LOW",
      -      "MEDIUM",
      -      "HIGH",
      -      "CRITICAL"
      -    ],
      -    "type": "string"
      -  },
      -  "safe_to_buy": {
      -    "type": "boolean"
      -  },
      -  "signals": {
      -    "properties": {
      -      "active_ad_campaigns": {
      -        "type": [
      -          "boolean",
      -          "null"
      -        ]
      -      },
      -      "domain_age_days": {
      -        "type": [
      -          "number",
      -          "null"
      -        ]
      -      },
      -      "has_active_employees": {
      -        "type": [
      -          "boolean",
      -          "null"
      -        ]
      -      },
      -      "legitimate_tech_stack": {
      -        "type": [
      -          "boolean",
      -          "null"
      -        ]
      -      },
      -      "onchain_reputation_score": {
      -        "type": [
      -          "number",
      -          "null"
      -        ]
      -      },
      -      "open_jobs_count": {
      -        "type": [
      -          "number",
      -          "null"
      -        ]
      -      }
      -    },
      -    "required": [
      -      "domain_age_days",
      -      "has_active_employees",
      -      "open_jobs_count",
      -      "legitimate_tech_stack",
      -      "active_ad_campaigns",
      -      "onchain_reputation_score"
      -    ],
      -    "type": "object"
      -  },
      -  "signed_statement": {
      -    "type": "string"
      -  },
      -  "status": {
      -    "enum": [
      -      "ok",
      -      "no_data",
      -      "unreachable"
      -    ],
      -    "type": "string"
      -  },
      -  "trust_score": {
      -    "maximum": 100,
      -    "minimum": 0,
      -    "type": "number"
      -  },
      -  "verification_key": {
      -    "type": "object"
      -  }
      -}
    • removedOutput schema / required
      Removed value: -[
      -  "domain",
      -  "status"
      -]
  8. Added

TDQS

B3.4/5.0
Behavior4/5

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

Annotations already establish a safe read (readOnlyHint=true) over an open world, so the description adds real value on top: the cost ($0.005 per result), the presence of an expiry and a public verification key, the 'no third-party certification' constraint, and an explicit disclaimer that issuance is not an endorsement of ownership or safety. What's missing is any hint on how the signature is verified downstream, but the disclosure of cost and scope limits is the substantive part.

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

Conciseness3/5

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

The valuable content (what it proves, cost, scope limits) is front-loaded and compact, which is good. But the final two clauses are cryptic fragments — 'Risk evidence: pre_purchase_merchant_trust_check; API checks: x402_merchant_trust_check' — that read as unexplained tags and don't clearly earn their place.

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?

With an output schema present, the description needn't explain return values, and the required parameters are fully documented. Combined with cost disclosure and the explicit scope caveat, an agent has enough to call this correctly; the only gap is the ambiguous relationship to the two sibling tools it names.

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?

Both parameters are fully documented in the schema (domain format, context privacy note), so the schema does the heavy lifting. The description adds nothing about the domain argument — no format, eligibility, or failure behavior — which is acceptable at 100% coverage but not more than the baseline.

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 opening clause states a specific resource — signed merchant evidence with an expiry and public verification key — and explicitly bounds the claim (proves issuance, not ownership or safety). That makes the artifact's nature clear, though the trailing 'Risk evidence: … / API checks: …' fragments are labels without a verb and slightly muddy what the tool actually returns versus what siblings do.

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 explicit when-to-use, when-not-to-use, or routing guidance. The two sibling names appear as bare labels (pre_purchase_merchant_trust_check, x402_merchant_trust_check) with no condition telling the agent when to pick this tool over them, so the agent must infer the distinction.

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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