diff --git a/src/app/api/auth/register/route.ts b/src/app/api/auth/register/route.ts
index 61b1b8c..0ef2a69 100644
--- a/src/app/api/auth/register/route.ts
+++ b/src/app/api/auth/register/route.ts
@@ -129,7 +129,7 @@ export async function POST(request: NextRequest) {
       cchApiKey: null,
       cchApiKeyConfigured: false,
       defaultModel: 'claude-sonnet-4-5-20250929',
-      defaultTools: ['web_search', 'web_fetch'],
+      defaultTools: ['web_search', 'web_fetch', 'youdao_translate'],
       theme: 'light',
       language: 'zh-CN',
       fontSize: 15,
diff --git a/src/drizzle/seed.ts b/src/drizzle/seed.ts
index 53e6f78..2193544 100644
--- a/src/drizzle/seed.ts
+++ b/src/drizzle/seed.ts
@@ -15,7 +15,7 @@ async function seedUserSettings() {
       cchApiKeyConfigured: false,
       metasoApiKeyConfigured: false,
       defaultModel: 'claude-sonnet-4-5-20250929',
-      defaultTools: ['web_search', 'web_fetch', 'mita_search', 'mita_reader'],
+      defaultTools: ['web_search', 'web_fetch', 'youdao_translate'],
       theme: 'light',
       language: 'zh-CN',
       enableThinking: false,
@@ -99,6 +99,31 @@ async function seedTools() {
       isDefault: true,
       sortOrder: 4,
     },
+    {
+      toolId: 'youdao_translate',
+      name: 'youdao_translate',
+      displayName: 'Translate',
+      description: '有道智云高质量多语言翻译，支持100+种语言互译',
+      icon: 'Languages',
+      inputSchema: {
+        type: 'object',
+        properties: {
+          text: { type: 'string', description: '待翻译的文本内容' },
+          from: {
+            type: 'string',
+            description: '源语言代码，如 en/zh-CHS/ja/ko/fr/de 等，默认auto自动检测',
+          },
+          to: {
+            type: 'string',
+            description: '目标语言代码，如 zh-CHS/en/ja/ko/fr/de 等，默认zh-CHS简体中文',
+          },
+        },
+        required: ['text'],
+      },
+      isEnabled: true,
+      isDefault: true,
+      sortOrder: 5,
+    },
   ];
 
   for (const tool of toolsData) {