diff --git a/pages/docs/features/custom-tools/page.tsx b/pages/docs/features/custom-tools/page.tsx
index f526c60..38b18f0 100644
--- a/pages/docs/features/custom-tools/page.tsx
+++ b/pages/docs/features/custom-tools/page.tsx
@@ -6,8 +6,6 @@ export default function CustomTools() {
 		<div>
 			<h1 className="text-4xl font-bold mb-6">自定义工具</h1>
 
-			<BetaNotice />
-
 			<p className="text-xl text-foreground/80 mb-8 leading-relaxed">
 				通过注册自定义工具，扩展 AI Agent 的能力边界。使用 Zod 定义严格的输入接口，让 AI
 				安全调用你的业务逻辑。
@@ -21,92 +19,40 @@ export default function CustomTools() {
 					</p>
 
 					<CodeEditor
-						code={`import { z } from 'zod'
-import { pageAgent } from 'page-agent'
+						code={`import zod from 'zod'
+import { PageAgent, tool } from 'page-agent'
 
-// 定义输入 schema
-const CreateUserSchema = z.object({
-  name: z.string().min(1, '姓名不能为空'),
-  email: z.string().email('邮箱格式不正确'),
-  role: z.enum(['admin', 'user', 'guest']).default('user')
-})
+// override internal tool
+const customTools = {
+	ask_user: tool({
+		description:
+			'Ask the user or parent model a question and wait for their answer. Use this if you need more information or clarification.',
+		inputSchema: zod.object({
+			question: zod.string(),
+		}),
+		execute: async function (this: PageAgent, input) {
+			const answer = await do_some_thing(input.question)
+			return "✅ Received user answer: " + answer
+		},
+	})
+}
 
-// 注册工具
-pageAgent.registerTool({
-  name: 'createUser',
-  description: '创建新用户账户',
-  input: CreateUserSchema,
-  execute: async (params) => {
-    // 执行业务逻辑
-    const response = await fetch('/api/users', {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify(params)
-    })
-    return await response.json()
-  }
-})`}
+// remove internal tool
+const customTools = {
+    ask_user: null // never ask user questions
+}
+	
+const pageAgent = new PageAgent({customTools})
+`}
 						language="javascript"
 					/>
 				</section>
 
-				<section>
-					<h2 className="text-2xl font-bold mb-4">属性详解</h2>
-					<div className="space-y-4">
-						<div className="p-4 bg-blue-50 dark:bg-blue-900/20 rounded-lg">
-							<h3 className="text-lg font-semibold text-blue-900 dark:text-blue-300 mb-2">
-								📝 name (必需)
-							</h3>
-							<p className="text-foreground/80 mb-2">工具的唯一标识符，AI 通过此名称调用工具。</p>
-							<div className="bg-white dark:bg-gray-800 rounded p-3 text-sm">
-								<code>name: 'searchProducts' // 驼峰命名，语义清晰</code>
-							</div>
-						</div>
-
-						<div className="p-4 bg-green-50 dark:bg-green-900/20 rounded-lg">
-							<h3 className="text-lg font-semibold text-green-900 dark:text-green-300 mb-2">
-								💬 description (必需)
-							</h3>
-							<p className="text-foreground/80 mb-2">详细描述工具功能，帮助 AI 理解使用场景。</p>
-							<div className="bg-white dark:bg-gray-800 rounded p-3 text-sm">
-								<code>description: '根据关键词搜索商品，支持价格区间和分类筛选'</code>
-							</div>
-						</div>
-
-						<div className="p-4 bg-purple-50 dark:bg-purple-900/20 rounded-lg">
-							<h3 className="text-lg font-semibold text-purple-900 dark:text-purple-300 mb-2">
-								🔧 input (必需)
-							</h3>
-							<p className="text-foreground/80 mb-2">Zod schema 定义输入参数的类型和验证规则。</p>
-							<div className="bg-white dark:bg-gray-800 rounded p-3 text-sm">
-								<code>{`input: z.object({
-  keyword: z.string().min(1),
-  priceRange: z.object({
-    min: z.number().optional(),
-    max: z.number().optional()
-  }).optional()
-})`}</code>
-							</div>
-						</div>
-
-						<div className="p-4 bg-orange-50 dark:bg-orange-900/20 rounded-lg">
-							<h3 className="text-lg font-semibold text-orange-900 dark:text-orange-300 mb-2">
-								⚡ execute (必需)
-							</h3>
-							<p className="text-foreground/80 mb-2">异步函数，接收验证后的参数并执行具体逻辑。</p>
-							<div className="bg-white dark:bg-gray-800 rounded p-3 text-sm">
-								<code>{`execute: async (params) => {
-  // params 已通过 Zod 验证
-  const result = await businessLogic(params)
-  return result // 返回结果给 AI
-}`}</code>
-							</div>
-						</div>
-					</div>
-				</section>
-
 				<section>
 					<h2 className="text-2xl font-bold mb-4">页面过滤器</h2>
+
+					<BetaNotice />
+
 					<p className="text-foreground/80 mb-4">
 						通过 <code className="bg-gray-200 dark:bg-gray-700 px-2 py-1 rounded">pageFilter</code>{' '}
 						属性控制工具在哪些页面可见，提升安全性和用户体验。
diff --git a/pages/docs/features/model-integration/page.tsx b/pages/docs/features/model-integration/page.tsx
index 676b5bd..d5c82ef 100644
--- a/pages/docs/features/model-integration/page.tsx
+++ b/pages/docs/features/model-integration/page.tsx
@@ -6,8 +6,6 @@ export default function ModelIntegration() {
 		<div>
 			<h1 className="text-4xl font-bold mb-6">模型接入</h1>
 
-			<BetaNotice />
-
 			<p className="text-xl text-gray-600 dark:text-gray-300 mb-6 leading-relaxed">
 				当前支持符合 OpenAI 接口规范且支持 tool call 的模型，包括公有云服务和私有部署方案。
 			</p>
diff --git a/pages/docs/introduction/quick-start/page.tsx b/pages/docs/introduction/quick-start/page.tsx
index fc62609..836b0b7 100644
--- a/pages/docs/introduction/quick-start/page.tsx
+++ b/pages/docs/introduction/quick-start/page.tsx
@@ -6,8 +6,6 @@ export default function QuickStart() {
 		<div>
 			<h1 className="text-4xl font-bold mb-6">Quick Start</h1>
 
-			<BetaNotice />
-
 			<p className=" mb-6 leading-relaxed">几分钟内完成 page-agent 的集成。</p>
 
 			<h2 className="text-2xl font-bold mb-3">安装步骤</h2>
diff --git a/src/config/index.ts b/src/config/index.ts
index 06e39f1..9187afe 100644
--- a/src/config/index.ts
+++ b/src/config/index.ts
@@ -43,7 +43,7 @@ export interface UIConfig {
 	 * 	}),
 	 * 	execute: async function (this: PageAgent, input) {
 	 * 		const answer = await do_some_thing(input.question)
-	 * 		return `✅ Received user answer: ${answer}` + (await getSystemInfo())
+	 * 		return `✅ Received user answer: ${answer}`
 	 * 	},
 	 * })
 	 * }