YouTube 关键词工具：按地区获取自动补全建议

{
  "type": "object",
  "required": [
    "queryParams"
  ],
  "properties": {
    "queryParams": {
      "type": "object",
      "required": [
        "keyword"
      ],
      "properties": {
        "region": {
          "type": "string",
          "title": "Region",
          "default": "US",
          "examples": [
            "US"
          ],
          "description": "地区代码，例如 US、SG、CN 或 JP。"
        },
        "keyword": {
          "type": "string",
          "title": "Keyword",
          "examples": [
            "Rick Astley"
          ],
          "maxLength": 200,
          "description": "搜索关键词。"
        },
        "language": {
          "type": "string",
          "title": "Language",
          "default": "en",
          "examples": [
            "en"
          ],
          "description": "语言代码，例如 en、zh-cn 或 ja。"
        }
      },
      "additionalProperties": true
    }
  },
  "additionalProperties": false
}