{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/OutputMessageContentItems",
  "title": "OutputMessageContentItems",
  "oneOf": [
    {
      "type": "object",
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "text"
          ],
          "description": "Discriminator value: text"
        },
        "text": {
          "type": "string"
        }
      },
      "required": [
        "type",
        "text"
      ],
      "description": "Text content block."
    },
    {
      "type": "object",
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "image_url"
          ],
          "description": "Discriminator value: image_url"
        },
        "url": {
          "type": "string"
        }
      },
      "required": [
        "type",
        "url"
      ],
      "description": "Image URL content block for vision models."
    },
    {
      "type": "object",
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "image"
          ]
        },
        "source_type": {
          "$ref": "#/components/schemas/ImageContentSourceType"
        },
        "media_type": {
          "type": "string",
          "description": "e.g. 'image/png', 'image/jpeg'"
        },
        "data": {
          "type": "string",
          "description": "Base64-encoded image data or URL"
        }
      },
      "required": [
        "type",
        "media_type",
        "data"
      ],
      "description": "Image content block with explicit source type."
    },
    {
      "type": "object",
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "document"
          ]
        },
        "source_type": {
          "$ref": "#/components/schemas/DocumentContentSourceType"
        },
        "media_type": {
          "type": "string",
          "description": "e.g. 'application/pdf'"
        },
        "data": {
          "type": "string",
          "description": "Base64-encoded content or URL"
        }
      },
      "required": [
        "type",
        "media_type",
        "data"
      ],
      "description": "Document content block (PDF, etc.) for document-understanding models."
    },
    {
      "type": "object",
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "tool_use"
          ],
          "description": "Discriminator value: tool_use"
        },
        "id": {
          "type": "string"
        },
        "name": {
          "type": "string"
        },
        "input": {
          "type": "object",
          "additionalProperties": {
            "description": "Any type"
          }
        }
      },
      "required": [
        "type",
        "id",
        "name",
        "input"
      ],
      "description": "Tool use content block (in assistant output)."
    }
  ],
  "discriminator": {
    "propertyName": "type"
  }
}