diff --git a/web/pages/ToolLibrary.tsx b/web/pages/ToolLibrary.tsx
index 84074d8..2738cfd 100644
--- a/web/pages/ToolLibrary.tsx
+++ b/web/pages/ToolLibrary.tsx
@@ -1,6 +1,6 @@
 import React, { useEffect, useState } from 'react';
 import { Search, Filter, Plus, Wrench, Terminal, Globe, Camera, CameraOff, Image, Images, CloudSun, Calendar, TrendingUp, Coins, Trash2, Edit2, Box, Volume2 } from 'lucide-react';
-import { Button, Input, Badge, Dialog } from '../components/UI';
+import { Button, Input, Badge, Dialog, Drawer } from '../components/UI';
 import { Tool } from '../types';
 import { createTool, deleteTool, fetchTools, updateTool } from '../services/backendApi';
 
@@ -170,6 +170,19 @@ const buildToolParameterConfig = (drafts: ToolParameterDraft[]): { schema: Recor
   };
 };
 
+const defaultsFromSchema = (schema: Record<string, any>): Record<string, any> => {
+  const defaults: Record<string, any> = {};
+  const properties = schema?.properties;
+  if (!properties || typeof properties !== 'object' || Array.isArray(properties)) return defaults;
+  for (const [key, spec] of Object.entries(properties)) {
+    if (!spec || typeof spec !== 'object' || Array.isArray(spec)) continue;
+    if (Object.prototype.hasOwnProperty.call(spec, 'default')) {
+      defaults[key] = (spec as Record<string, any>).default;
+    }
+  }
+  return defaults;
+};
+
 export const ToolLibraryPage: React.FC = () => {
   const [tools, setTools] = useState<Tool[]>([]);
   const [searchTerm, setSearchTerm] = useState('');
@@ -190,6 +203,9 @@ export const ToolLibraryPage: React.FC = () => {
   const [toolHttpHeadersText, setToolHttpHeadersText] = useState('{}');
   const [toolHttpTimeoutMs, setToolHttpTimeoutMs] = useState(10000);
   const [toolParameters, setToolParameters] = useState<ToolParameterDraft[]>([]);
+  const [schemaDrawerOpen, setSchemaDrawerOpen] = useState(false);
+  const [schemaEditorText, setSchemaEditorText] = useState('');
+  const [schemaEditorError, setSchemaEditorError] = useState('');
   const [saving, setSaving] = useState(false);
 
   const loadTools = async () => {
@@ -222,6 +238,9 @@ export const ToolLibraryPage: React.FC = () => {
     setToolHttpHeadersText('{}');
     setToolHttpTimeoutMs(10000);
     setToolParameters([]);
+    setSchemaEditorError('');
+    setSchemaEditorText(JSON.stringify({ type: 'object', properties: {}, required: [] }, null, 2));
+    setSchemaDrawerOpen(false);
     setIsToolModalOpen(true);
   };
 
@@ -239,9 +258,92 @@ export const ToolLibraryPage: React.FC = () => {
     setToolHttpHeadersText(JSON.stringify(tool.httpHeaders || {}, null, 2));
     setToolHttpTimeoutMs(tool.httpTimeoutMs || 10000);
     setToolParameters(draftsFromSchema(tool.parameterSchema, tool.parameterDefaults));
+    setSchemaEditorError('');
+    setSchemaEditorText(
+      JSON.stringify(
+        (tool.parameterSchema && typeof tool.parameterSchema === 'object')
+          ? tool.parameterSchema
+          : { type: 'object', properties: {}, required: [] },
+        null,
+        2
+      )
+    );
+    setSchemaDrawerOpen(false);
     setIsToolModalOpen(true);
   };
 
+  const openSchemaDrawer = () => {
+    const parameterConfig = buildToolParameterConfig(toolParameters);
+    if (!parameterConfig.error) {
+      setSchemaEditorText(JSON.stringify(parameterConfig.schema, null, 2));
+    } else if (editingTool?.parameterSchema && typeof editingTool.parameterSchema === 'object') {
+      setSchemaEditorText(JSON.stringify(editingTool.parameterSchema, null, 2));
+    } else if (!schemaEditorText.trim()) {
+      setSchemaEditorText(JSON.stringify({ type: 'object', properties: {}, required: [] }, null, 2));
+    }
+    setSchemaEditorError('');
+    setSchemaDrawerOpen(true);
+  };
+
+  const formatSchemaEditor = () => {
+    try {
+      const parsed = JSON.parse(schemaEditorText || '{}');
+      setSchemaEditorText(JSON.stringify(parsed, null, 2));
+      setSchemaEditorError('');
+    } catch {
+      setSchemaEditorError('Schema 不是合法 JSON，无法格式化。');
+    }
+  };
+
+  const applySchemaEditor = () => {
+    let parsedSchema: Record<string, any>;
+    try {
+      const parsed = JSON.parse(schemaEditorText || '{}');
+      if (!parsed || typeof parsed !== 'object' || Array.isArray(parsed)) {
+        setSchemaEditorError('Schema 必须是 JSON 对象。');
+        return;
+      }
+      parsedSchema = parsed as Record<string, any>;
+    } catch {
+      setSchemaEditorError('Schema 不是合法 JSON。');
+      return;
+    }
+
+    if (parsedSchema.type !== undefined && parsedSchema.type !== 'object') {
+      setSchemaEditorError("Schema.type 必须为 'object'。");
+      return;
+    }
+    if (
+      parsedSchema.properties !== undefined
+      && (!parsedSchema.properties || typeof parsedSchema.properties !== 'object' || Array.isArray(parsedSchema.properties))
+    ) {
+      setSchemaEditorError('Schema.properties 必须是对象。');
+      return;
+    }
+    if (parsedSchema.required !== undefined && !Array.isArray(parsedSchema.required)) {
+      setSchemaEditorError('Schema.required 必须是数组。');
+      return;
+    }
+
+    const normalizedSchema: Record<string, any> = {
+      ...parsedSchema,
+      type: 'object',
+      properties: parsedSchema.properties && typeof parsedSchema.properties === 'object' && !Array.isArray(parsedSchema.properties)
+        ? parsedSchema.properties
+        : {},
+      required: Array.isArray(parsedSchema.required) ? parsedSchema.required : [],
+    };
+
+    const currentParameterConfig = buildToolParameterConfig(toolParameters);
+    const currentDefaults = currentParameterConfig.error ? {} : currentParameterConfig.defaults;
+    const mergedDefaults = { ...currentDefaults, ...defaultsFromSchema(normalizedSchema) };
+
+    setToolParameters(draftsFromSchema(normalizedSchema, mergedDefaults));
+    setSchemaEditorError('');
+    setSchemaEditorText(JSON.stringify(normalizedSchema, null, 2));
+    setSchemaDrawerOpen(false);
+  };
+
   const filteredTools = tools.filter((tool) => {
     const q = searchTerm.toLowerCase();
     const matchesSearch =
@@ -506,12 +608,25 @@ export const ToolLibraryPage: React.FC = () => {
 
       <Dialog
         isOpen={isToolModalOpen}
-        onClose={() => setIsToolModalOpen(false)}
+        onClose={() => {
+          setIsToolModalOpen(false);
+          setSchemaDrawerOpen(false);
+          setSchemaEditorError('');
+        }}
         title={editingTool ? '编辑自定义工具' : '添加自定义工具'}
         contentClassName="max-w-4xl"
         footer={
           <>
-            <Button variant="ghost" onClick={() => setIsToolModalOpen(false)}>取消</Button>
+            <Button
+              variant="ghost"
+              onClick={() => {
+                setIsToolModalOpen(false);
+                setSchemaDrawerOpen(false);
+                setSchemaEditorError('');
+              }}
+            >
+              取消
+            </Button>
             <Button onClick={handleSaveTool} disabled={saving}>{saving ? '保存中...' : (editingTool ? '保存修改' : '确认添加')}</Button>
           </>
         }
@@ -606,9 +721,14 @@ export const ToolLibraryPage: React.FC = () => {
           <div className="space-y-4 rounded-md border border-white/10 bg-white/5 p-3">
             <div className="flex items-center justify-between">
               <div className="text-[10px] font-black uppercase tracking-widest text-emerald-300">Tool Parameters</div>
-              <Button type="button" variant="outline" size="sm" onClick={addToolParameter}>
-                <Plus className="w-3.5 h-3.5 mr-1" /> 添加参数
-              </Button>
+              <div className="flex items-center gap-2">
+                <Button type="button" variant="outline" size="sm" onClick={openSchemaDrawer}>
+                  Schema 抽屉
+                </Button>
+                <Button type="button" variant="outline" size="sm" onClick={addToolParameter}>
+                  <Plus className="w-3.5 h-3.5 mr-1" /> 添加参数
+                </Button>
+              </div>
             </div>
             {toolParameters.length === 0 ? (
               <div className="rounded-md border border-white/10 bg-black/20 p-3 text-xs text-muted-foreground">
@@ -744,6 +864,39 @@ export const ToolLibraryPage: React.FC = () => {
           </label>
         </div>
       </Dialog>
+      <Drawer
+        isOpen={schemaDrawerOpen}
+        onClose={() => {
+          setSchemaDrawerOpen(false);
+          setSchemaEditorError('');
+        }}
+        title="Tool Schema Editor"
+      >
+        <div className="space-y-3">
+          <p className="text-xs text-muted-foreground">
+            可在此粘贴/编辑 JSON Schema。点击「应用到参数表单」后会同步到上方参数编辑区。
+          </p>
+          <textarea
+            className="flex min-h-[58vh] w-full rounded-md border border-white/10 bg-white/5 px-3 py-2 text-xs shadow-sm placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-primary/50 text-white font-mono"
+            value={schemaEditorText}
+            onChange={(e) => {
+              setSchemaEditorText(e.target.value);
+              if (schemaEditorError) setSchemaEditorError('');
+            }}
+            placeholder='{"type":"object","properties":{},"required":[]}'
+          />
+          {schemaEditorError && (
+            <div className="rounded-md border border-red-500/30 bg-red-500/10 px-3 py-2 text-xs text-red-300">
+              {schemaEditorError}
+            </div>
+          )}
+          <div className="flex items-center justify-end gap-2">
+            <Button variant="ghost" onClick={() => setSchemaDrawerOpen(false)}>关闭</Button>
+            <Button variant="outline" onClick={formatSchemaEditor}>格式化</Button>
+            <Button onClick={applySchemaEditor}>应用到参数表单</Button>
+          </div>
+        </div>
+      </Drawer>
     </div>
   );
 };