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Darwin

by so.darwin
OverviewDiscussionsAdmin

Pay

pay
DestructiveIdempotent

Open hosted selection for an immutable payment request.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
requestYes
idempotencyKeyNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed5 schema fields changed
    • removedInput schema / properties / agent
      Removed value: -{
-  "maxLength": 200,
-  "minLength": 1,
-  "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-  "type": "string"
-}
    • removedInput schema / properties / method
      Removed value: -{
-  "enum": [
-    "card",
-    "bank",
-    "hosted_checkout",
-    "darwin_wallet",
-    "mpp",
-    "x402",
-    "ucp",
-    "acp"
-  ],
-  "type": "string"
-}
    • removedInput schema / properties / paymentMethod
      Removed value: -{
-  "maxLength": 200,
-  "minLength": 1,
-  "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-  "type": "string"
-}
    • changedInput schema / required
      Previous value: -[
-  "request",
-  "method"
-]New value: +[
+  "request"
+]
    • changedOutput schema / oneOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "expiresAt": {
-        "format": "date-time",
-        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
-        "type": "string"
-      },
-      "idempotencyKey": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "payment": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "status": {
-        "enum": [
-          "prepared",
-          "dispatching",
-          "uncertain",
-          "pending"
-        ],
-        "type": "string"
-      },
-      "url": {
-        "format": "uri",
-        "maxLength": 2048,
-        "type": "string"
-      }
-    },
-    "required": [
-      "payment",
-      "expiresAt",
-      "idempotencyKey",
-      "status",
-      "url"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "expiresAt": {
-        "format": "date-time",
-        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
-        "type": "string"
-      },
-      "idempotencyKey": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "payment": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "receipt": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "status": {
-        "enum": [
-          "settled",
-          "partially_refunded",
-          "reversal_pending",
-          "reversal_failed",
-          "disputed",
-          "refunded"
-        ],
-        "type": "string"
-      }
-    },
-    "required": [
-      "payment",
-      "expiresAt",
-      "idempotencyKey",
-      "status",
-      "receipt"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "expiresAt": {
-        "format": "date-time",
-        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
-        "type": "string"
-      },
-      "idempotencyKey": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "payment": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "status": {
-        "enum": [
-          "failed",
-          "voided"
-        ],
-        "type": "string"
-      }
-    },
-    "required": [
-      "payment",
-      "expiresAt",
-      "idempotencyKey",
-      "status"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "expiresAt": {
+        "format": "date-time",
+        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
+        "type": "string"
+      },
+      "idempotencyKey": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "request": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "status": {
+        "const": "selection_required",
+        "type": "string"
+      },
+      "url": {
+        "format": "uri",
+        "maxLength": 2048,
+        "type": "string"
+      }
+    },
+    "required": [
+      "request",
+      "status",
+      "expiresAt",
+      "url",
+      "idempotencyKey"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "expiresAt": {
+        "format": "date-time",
+        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
+        "type": "string"
+      },
+      "idempotencyKey": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "payment": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "status": {
+        "enum": [
+          "prepared",
+          "dispatching",
+          "uncertain",
+          "pending"
+        ],
+        "type": "string"
+      },
+      "url": {
+        "format": "uri",
+        "maxLength": 2048,
+        "type": "string"
+      }
+    },
+    "required": [
+      "payment",
+      "expiresAt",
+      "idempotencyKey",
+      "status",
+      "url"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "expiresAt": {
+        "format": "date-time",
+        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
+        "type": "string"
+      },
+      "idempotencyKey": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "payment": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "receipt": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "status": {
+        "enum": [
+          "settled",
+          "partially_refunded",
+          "reversal_pending",
+          "reversal_failed",
+          "disputed",
+          "refunded"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "payment",
+      "expiresAt",
+      "idempotencyKey",
+      "status",
+      "receipt"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "expiresAt": {
+        "format": "date-time",
+        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
+        "type": "string"
+      },
+      "idempotencyKey": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "payment": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "status": {
+        "enum": [
+          "failed",
+          "voided"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "payment",
+      "expiresAt",
+      "idempotencyKey",
+      "status"
+    ],
+    "type": "object"
+  }
+]
  2. Changed8 schema fields changed
    • removedInput schema / properties / actingAiId
      Removed value: -{
-  "maxLength": 200,
-  "minLength": 1,
-  "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-  "type": "string"
-}
    • addedInput schema / properties / agent
      Added value: +{
+  "maxLength": 200,
+  "minLength": 1,
+  "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+  "type": "string"
+}
    • addedInput schema / properties / paymentMethod
      Added value: +{
+  "maxLength": 200,
+  "minLength": 1,
+  "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+  "type": "string"
+}
    • removedInput schema / properties / paymentMethodId
      Removed value: -{
-  "maxLength": 200,
-  "minLength": 1,
-  "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-  "type": "string"
-}
    • removedInput schema / properties / paymentRequestId
      Removed value: -{
-  "maxLength": 200,
-  "minLength": 1,
-  "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-  "type": "string"
-}
    • addedInput schema / properties / request
      Added value: +{
+  "maxLength": 200,
+  "minLength": 1,
+  "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+  "type": "string"
+}
    • changedInput schema / required
      Previous value: -[
-  "actingAiId",
-  "paymentRequestId",
-  "method",
-  "idempotencyKey"
-]New value: +[
+  "request",
+  "method"
+]
    • changedOutput schema / oneOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "amountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "currency": {
-        "pattern": "^[A-Z]{3}$",
-        "type": "string"
-      },
-      "disputeAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "disputeStatus": {
-        "enum": [
-          "warning_needs_response",
-          "warning_under_review",
-          "warning_closed",
-          "needs_response",
-          "under_review",
-          "won",
-          "lost"
-        ],
-        "type": "string"
-      },
-      "expiresAt": {
-        "format": "date-time",
-        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
-        "type": "string"
-      },
-      "failedRefundAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "method": {
-        "enum": [
-          "card",
-          "bank",
-          "hosted_checkout",
-          "darwin_wallet",
-          "mpp",
-          "x402",
-          "ucp",
-          "acp"
-        ],
-        "type": "string"
-      },
-      "payeeId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentMethodId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentRequestId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentUrl": {
-        "format": "uri",
-        "maxLength": 2048,
-        "type": "string"
-      },
-      "pendingRefundAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "reconciliationRequired": {
-        "const": false,
-        "type": "boolean"
-      },
-      "refundAmountMinor": {
-        "pattern": "^(0|[1-9][0-9]{0,17})$",
-        "type": "string"
-      },
-      "revision": {
-        "maximum": 9007199254740991,
-        "minimum": 0,
-        "type": "integer"
-      },
-      "status": {
-        "const": "prepared",
-        "type": "string"
-      },
-      "threadId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      }
-    },
-    "required": [
-      "paymentId",
-      "paymentRequestId",
-      "threadId",
-      "revision",
-      "method",
-      "paymentMethodId",
-      "amountMinor",
-      "currency",
-      "payeeId",
-      "expiresAt",
-      "status",
-      "reconciliationRequired",
-      "paymentUrl"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "amountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "currency": {
-        "pattern": "^[A-Z]{3}$",
-        "type": "string"
-      },
-      "disputeAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "disputeStatus": {
-        "enum": [
-          "warning_needs_response",
-          "warning_under_review",
-          "warning_closed",
-          "needs_response",
-          "under_review",
-          "won",
-          "lost"
-        ],
-        "type": "string"
-      },
-      "expiresAt": {
-        "format": "date-time",
-        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
-        "type": "string"
-      },
-      "failedRefundAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "method": {
-        "enum": [
-          "card",
-          "bank",
-          "hosted_checkout",
-          "darwin_wallet",
-          "mpp",
-          "x402",
-          "ucp",
-          "acp"
-        ],
-        "type": "string"
-      },
-      "payeeId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentMethodId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentRequestId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentUrl": {
-        "format": "uri",
-        "maxLength": 2048,
-        "type": "string"
-      },
-      "pendingRefundAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "reconciliationRequired": {
-        "const": true,
-        "type": "boolean"
-      },
-      "refundAmountMinor": {
-        "pattern": "^(0|[1-9][0-9]{0,17})$",
-        "type": "string"
-      },
-      "revision": {
-        "maximum": 9007199254740991,
-        "minimum": 0,
-        "type": "integer"
-      },
-      "status": {
-        "enum": [
-          "dispatching",
-          "uncertain",
-          "pending"
-        ],
-        "type": "string"
-      },
-      "threadId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      }
-    },
-    "required": [
-      "paymentId",
-      "paymentRequestId",
-      "threadId",
-      "revision",
-      "method",
-      "paymentMethodId",
-      "amountMinor",
-      "currency",
-      "payeeId",
-      "expiresAt",
-      "status",
-      "reconciliationRequired",
-      "paymentUrl"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "amountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "currency": {
-        "pattern": "^[A-Z]{3}$",
-        "type": "string"
-      },
-      "disputeAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "disputeStatus": {
-        "enum": [
-          "warning_needs_response",
-          "warning_under_review",
-          "warning_closed",
-          "needs_response",
-          "under_review",
-          "won",
-          "lost"
-        ],
-        "type": "string"
-      },
-      "expiresAt": {
-        "format": "date-time",
-        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
-        "type": "string"
-      },
-      "failedRefundAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "method": {
-        "enum": [
-          "card",
-          "bank",
-          "hosted_checkout",
-          "darwin_wallet",
-          "mpp",
-          "x402",
-          "ucp",
-          "acp"
-        ],
-        "type": "string"
-      },
-      "payeeId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentMethodId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentRequestId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "pendingRefundAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "receiptId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "receiptRelay": {
-        "enum": [
-          "pending",
-          "delivered",
-          "unknown",
-          "withheld"
-        ],
-        "type": "string"
-      },
-      "reconciliationRequired": {
-        "const": false,
-        "type": "boolean"
-      },
-      "refundAmountMinor": {
-        "pattern": "^(0|[1-9][0-9]{0,17})$",
-        "type": "string"
-      },
-      "revision": {
-        "maximum": 9007199254740991,
-        "minimum": 0,
-        "type": "integer"
-      },
-      "status": {
-        "const": "settled",
-        "type": "string"
-      },
-      "threadId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      }
-    },
-    "required": [
-      "paymentId",
-      "paymentRequestId",
-      "threadId",
-      "revision",
-      "method",
-      "paymentMethodId",
-      "amountMinor",
-      "currency",
-      "payeeId",
-      "expiresAt",
-      "status",
-      "reconciliationRequired",
-      "receiptId",
-      "receiptRelay"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "amountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "currency": {
-        "pattern": "^[A-Z]{3}$",
-        "type": "string"
-      },
-      "disputeAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "disputeStatus": {
-        "enum": [
-          "warning_needs_response",
-          "warning_under_review",
-          "warning_closed",
-          "needs_response",
-          "under_review",
-          "won",
-          "lost"
-        ],
-        "type": "string"
-      },
-      "expiresAt": {
-        "format": "date-time",
-        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
-        "type": "string"
-      },
-      "failedRefundAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "method": {
-        "enum": [
-          "card",
-          "bank",
-          "hosted_checkout",
-          "darwin_wallet",
-          "mpp",
-          "x402",
-          "ucp",
-          "acp"
-        ],
-        "type": "string"
-      },
-      "payeeId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentMethodId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentRequestId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "pendingRefundAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "receiptId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "receiptRelay": {
-        "enum": [
-          "pending",
-          "delivered",
-          "unknown",
-          "withheld"
-        ],
-        "type": "string"
-      },
-      "reconciliationRequired": {
-        "const": true,
-        "type": "boolean"
-      },
-      "refundAmountMinor": {
-        "pattern": "^(0|[1-9][0-9]{0,17})$",
-        "type": "string"
-      },
-      "revision": {
-        "maximum": 9007199254740991,
-        "minimum": 0,
-        "type": "integer"
-      },
-      "status": {
-        "enum": [
-          "partially_refunded",
-          "reversal_pending",
-          "reversal_failed",
-          "disputed"
-        ],
-        "type": "string"
-      },
-      "threadId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      }
-    },
-    "required": [
-      "paymentId",
-      "paymentRequestId",
-      "threadId",
-      "revision",
-      "method",
-      "paymentMethodId",
-      "amountMinor",
-      "currency",
-      "payeeId",
-      "expiresAt",
-      "status",
-      "reconciliationRequired",
-      "receiptId",
-      "receiptRelay"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "amountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "currency": {
-        "pattern": "^[A-Z]{3}$",
-        "type": "string"
-      },
-      "disputeAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "disputeStatus": {
-        "enum": [
-          "warning_needs_response",
-          "warning_under_review",
-          "warning_closed",
-          "needs_response",
-          "under_review",
-          "won",
-          "lost"
-        ],
-        "type": "string"
-      },
-      "expiresAt": {
-        "format": "date-time",
-        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
-        "type": "string"
-      },
-      "failedRefundAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "method": {
-        "enum": [
-          "card",
-          "bank",
-          "hosted_checkout",
-          "darwin_wallet",
-          "mpp",
-          "x402",
-          "ucp",
-          "acp"
-        ],
-        "type": "string"
-      },
-      "payeeId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentMethodId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentRequestId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "pendingRefundAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "receiptId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "receiptRelay": {
-        "enum": [
-          "pending",
-          "delivered",
-          "unknown",
-          "withheld"
-        ],
-        "type": "string"
-      },
-      "reconciliationRequired": {
-        "const": false,
-        "type": "boolean"
-      },
-      "refundAmountMinor": {
-        "pattern": "^(0|[1-9][0-9]{0,17})$",
-        "type": "string"
-      },
-      "revision": {
-        "maximum": 9007199254740991,
-        "minimum": 0,
-        "type": "integer"
-      },
-      "status": {
-        "const": "refunded",
-        "type": "string"
-      },
-      "threadId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      }
-    },
-    "required": [
-      "paymentId",
-      "paymentRequestId",
-      "threadId",
-      "revision",
-      "method",
-      "paymentMethodId",
-      "amountMinor",
-      "currency",
-      "payeeId",
-      "expiresAt",
-      "status",
-      "reconciliationRequired",
-      "receiptId",
-      "receiptRelay"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "amountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "currency": {
-        "pattern": "^[A-Z]{3}$",
-        "type": "string"
-      },
-      "disputeAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "disputeStatus": {
-        "enum": [
-          "warning_needs_response",
-          "warning_under_review",
-          "warning_closed",
-          "needs_response",
-          "under_review",
-          "won",
-          "lost"
-        ],
-        "type": "string"
-      },
-      "expiresAt": {
-        "format": "date-time",
-        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
-        "type": "string"
-      },
-      "failedRefundAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "method": {
-        "enum": [
-          "card",
-          "bank",
-          "hosted_checkout",
-          "darwin_wallet",
-          "mpp",
-          "x402",
-          "ucp",
-          "acp"
-        ],
-        "type": "string"
-      },
-      "payeeId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentMethodId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "paymentRequestId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      },
-      "pendingRefundAmountMinor": {
-        "pattern": "^[1-9][0-9]{0,17}$",
-        "type": "string"
-      },
-      "reconciliationRequired": {
-        "const": false,
-        "type": "boolean"
-      },
-      "refundAmountMinor": {
-        "pattern": "^(0|[1-9][0-9]{0,17})$",
-        "type": "string"
-      },
-      "revision": {
-        "maximum": 9007199254740991,
-        "minimum": 0,
-        "type": "integer"
-      },
-      "status": {
-        "enum": [
-          "failed",
-          "voided"
-        ],
-        "type": "string"
-      },
-      "threadId": {
-        "maxLength": 200,
-        "minLength": 1,
-        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
-        "type": "string"
-      }
-    },
-    "required": [
-      "paymentId",
-      "paymentRequestId",
-      "threadId",
-      "revision",
-      "method",
-      "paymentMethodId",
-      "amountMinor",
-      "currency",
-      "payeeId",
-      "expiresAt",
-      "status",
-      "reconciliationRequired"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "expiresAt": {
+        "format": "date-time",
+        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
+        "type": "string"
+      },
+      "idempotencyKey": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "payment": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "status": {
+        "enum": [
+          "prepared",
+          "dispatching",
+          "uncertain",
+          "pending"
+        ],
+        "type": "string"
+      },
+      "url": {
+        "format": "uri",
+        "maxLength": 2048,
+        "type": "string"
+      }
+    },
+    "required": [
+      "payment",
+      "expiresAt",
+      "idempotencyKey",
+      "status",
+      "url"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "expiresAt": {
+        "format": "date-time",
+        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
+        "type": "string"
+      },
+      "idempotencyKey": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "payment": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "receipt": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "status": {
+        "enum": [
+          "settled",
+          "partially_refunded",
+          "reversal_pending",
+          "reversal_failed",
+          "disputed",
+          "refunded"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "payment",
+      "expiresAt",
+      "idempotencyKey",
+      "status",
+      "receipt"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "expiresAt": {
+        "format": "date-time",
+        "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
+        "type": "string"
+      },
+      "idempotencyKey": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "payment": {
+        "maxLength": 200,
+        "minLength": 1,
+        "pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
+        "type": "string"
+      },
+      "status": {
+        "enum": [
+          "failed",
+          "voided"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "payment",
+      "expiresAt",
+      "idempotencyKey",
+      "status"
+    ],
+    "type": "object"
+  }
+]
  3. Added

TDQS

C2.4/5.0
Behavior3/5

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

Annotations already declare readOnlyHint=false, openWorldHint=true, idempotentHint=true, and destructiveHint=true. The description adds that the payment request is immutable and that selection is hosted, which is useful context, but it does not explain auth requirements, what destructive behavior entails, or how idempotency is enforced.

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 description is a single concise sentence with no wasted words. However, it is under-specified for a payment tool with multiple behavioral annotations and two parameters, so conciseness comes at the cost of useful detail.

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

Completeness2/5

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

An output schema exists, so return values need not be described, and annotations cover the safety profile. Still, with 0% schema description coverage and no usage guidance, the description leaves critical gaps about parameter meaning and when to invoke the tool.

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

Parameters1/5

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

Schema description coverage is 0%, so the description must compensate for undocumented parameters. It does not explain the required 'request' parameter or the optional 'idempotencyKey' parameter, their formats, or their roles in the payment flow.

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

Purpose3/5

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

The description states an action and resource: 'Open hosted selection for an immutable payment request.' However, it does not clearly say that this initiates a payment, and it does not distinguish the tool from siblings like list_payment_methods or authenticate. The purpose is implied but vague.

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 alternatives, no prerequisites, and no exclusions. The description gives no indication of the context in which an agent should select pay over sibling tools.

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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