Retain an incoming Studio reference

{
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "storyworldId": {
      "type": "string",
      "pattern": "^[a-fA-F0-9]{24}$",
      "description": "ID of an accessible saved Storyworld returned by discovery. Keep this destination fixed for the operation."
    },
    "purpose": {
      "type": "string",
      "enum": [
        "character",
        "location",
        "artifact"
      ]
    },
    "title": {
      "type": "string",
      "minLength": 1,
      "maxLength": 200
    },
    "operationId": {
      "type": "string",
      "pattern": "^[a-zA-Z0-9-]{16,64}$",
      "description": "Persist a client-generated UUID before this mutation. Repeat identical inputs and this same ID after interruption; a new ID is a new request."
    },
    "mimeType": {
      "type": "string",
      "enum": [
        "image/png",
        "image/jpeg",
        "image/webp"
      ]
    },
    "fileBase64": {
      "type": "string",
      "minLength": 4,
      "maxLength": 4194304,
      "description": "Programmatic upload bytes only. Use a host attachment adapter; never compose base64 in model text. Otherwise upload in Studio and reuse its saved asset ID."
    },
    "source": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "rightsBasis": {
          "type": "string",
          "enum": [
            "creator_owned",
            "licensed",
            "consented",
            "public_domain",
            "other"
          ]
        },
        "rightsConfirmed": {
          "type": "boolean",
          "const": true,
          "description": "True only with a valid creator/rights declaration for the supplied source. Never invent consent."
        },
        "provider": {
          "type": "string",
          "minLength": 1,
          "maxLength": 120
        },
        "modelId": {
          "type": "string",
          "minLength": 1,
          "maxLength": 200
        },
        "prompt": {
          "type": "string",
          "minLength": 1,
          "maxLength": 16000
        },
        "rightsStatement": {
          "type": "string",
          "minLength": 1,
          "maxLength": 2000
        }
      },
      "required": [
        "provider",
        "rightsStatement",
        "rightsBasis",
        "rightsConfirmed"
      ]
    }
  },
  "required": [
    "storyworldId",
    "title",
    "operationId",
    "mimeType",
    "fileBase64",
    "source"
  ]
}

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "schemaVersion": {
      "type": "string",
      "const": "1"
    },
    "assetId": {
      "type": "string",
      "pattern": "^[a-f0-9]{24}$"
    },
    "storyworldId": {
      "type": "string",
      "pattern": "^[a-f0-9]{24}$"
    },
    "sha256": {
      "type": "string",
      "pattern": "^[a-f0-9]{64}$"
    },
    "mimeType": {
      "type": "string"
    },
    "sourceRecorded": {
      "type": "boolean",
      "const": true
    },
    "sourceRecordId": {
      "type": "string",
      "pattern": "^[a-f0-9]{64}$"
    },
    "sourceDeclarationSha256": {
      "type": "string",
      "pattern": "^[a-f0-9]{64}$"
    },
    "sourceRecordLocation": {
      "type": "string",
      "const": "mcp_operation"
    },
    "assetProvenancePreserved": {
      "type": "boolean",
      "const": true
    }
  },
  "required": [
    "schemaVersion",
    "assetId",
    "storyworldId",
    "sha256",
    "mimeType",
    "sourceRecorded",
    "sourceRecordId",
    "sourceDeclarationSha256",
    "sourceRecordLocation",
    "assetProvenancePreserved"
  ],
  "additionalProperties": {}
}