# 在本機預覽圖片版位適配

Canonical URL: https://sosoapi.ai/zh-hant/docs/mcp/prepare-asset-images

`sosoapi_prepare_asset_images`

從有權存取嘅 Workspace 原圖，在本機產生一至四個已指定版位嘅裁切、補邊或相同比例縮放 JPEG 預覽。支援靜態 PNG 同 baseline JPEG，最多 20 MiB／8,388,608 像素；不支援嘅色彩設定要先匯出 sRGB。回傳精確檔案、尺寸、提示同來源記錄，確認後先用 sosoapi_upload_asset 及返回嘅 upload_arguments 儲存。唔會發布。

## Profiles 及連接方式

Profiles: core, full

Transports: stdio

Profile 只影響工具可見性，唔會授權。HTTP 冇本機檔案上傳。SOSOAPI_OUTPUT_SCHEMAS=1 會宣告輸出 schema；兩種模式都會回傳 structured results。

## 權限及改動

MCP annotations 只係發現提示，唔係存取控制保證；仍然有實際登入、角色、資源及能力檢查。

```json
{
  "readOnlyHint": false,
  "destructiveHint": false,
  "idempotentHint": false,
  "openWorldHint": false
}
```

`/assets-api/get` — agent:operate; synchronous_http_response

## 輸入欄位

```json
{
  "type": "object",
  "properties": {
    "workspace_id": {
      "type": "string",
      "format": "uuid"
    },
    "source_asset_id": {
      "type": "integer",
      "exclusiveMinimum": 0,
      "maximum": 9007199254740991
    },
    "outputs": {
      "minItems": 1,
      "maxItems": 4,
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "version": {
            "type": "number",
            "enum": [
              1
            ]
          },
          "destination": {
            "type": "string",
            "enum": [
              "facebook-feed-square",
              "facebook-feed-landscape",
              "instagram-feed-square",
              "instagram-feed-portrait"
            ]
          },
          "operation": {
            "type": "string",
            "enum": [
              "crop",
              "pad",
              "resize"
            ]
          },
          "focal_point": {
            "type": "object",
            "properties": {
              "x": {
                "type": "number",
                "minimum": 0,
                "maximum": 1
              },
              "y": {
                "type": "number",
                "minimum": 0,
                "maximum": 1
              }
            },
            "required": [
              "x",
              "y"
            ],
            "additionalProperties": false
          },
          "background": {
            "type": "string",
            "pattern": "^#[0-9a-fA-F]{6}$"
          }
        },
        "required": [
          "version",
          "destination",
          "operation",
          "focal_point",
          "background"
        ],
        "additionalProperties": false
      }
    }
  },
  "required": [
    "workspace_id",
    "source_asset_id",
    "outputs"
  ],
  "additionalProperties": false
}
```

## 結構化輸出

此 schema 描述成功工具結果嘅 structuredContent。MCP envelope 亦包括 content，失敗可能設定 isError；唔好將文字收據或接受請求當成平台終態。權限及重試規則見對應 API 操作。

```json
{
  "type": "object",
  "properties": {
    "stage": {
      "type": "string",
      "enum": [
        "ready",
        "failed"
      ]
    },
    "output_directory": {
      "type": "string"
    },
    "manifest_path": {
      "type": "string"
    },
    "preview_path": {
      "type": "string"
    },
    "retryable": {
      "type": "boolean"
    }
  },
  "required": [
    "stage"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#",
  "additionalProperties": {}
}
```

## 工具呼叫範例

以下虛構值已按 contract 驗證，唔係真實帳戶 ID、憑證或發佈紀錄。請用已授權範圍回傳嘅 ID、已準備好嘅素材及已審核排程取代，寫入前核對平台資格。此頁唔會呼叫 API。

```json
{
  "name": "sosoapi_prepare_asset_images",
  "arguments": {
    "workspace_id": "11111111-1111-4111-8111-111111111111",
    "source_asset_id": 42,
    "outputs": [
      {
        "version": 1,
        "destination": "facebook-feed-square",
        "operation": "pad",
        "focal_point": {
          "x": 0.5,
          "y": 0.5
        },
        "background": "#ffffff"
      }
    ]
  }
}
```

structuredContent

```json
{
  "stage": "ready",
  "output_directory": "/tmp/sosoapi-preparation-example",
  "manifest_path": "/tmp/sosoapi-preparation-example/manifest.json",
  "preview_path": "/tmp/sosoapi-preparation-example/preview.html",
  "images": [
    {
      "file_path": "/tmp/sosoapi-preparation-example/01-facebook-feed-square.jpg",
      "width": 1080,
      "height": 1080,
      "cropped": false,
      "upscaled": false
    }
  ]
}
```

## 對應 API 操作

- [/assets-api/get](https://sosoapi.ai/zh-hant/docs/api/assets-api-get)