fix parameter description data binding

web/app/components/tools/mcp/mcp-server-modal.tsx

@@ -115,6 +115,7 @@ const MCPServerModal = ({
                 <MCPServerParamItem
                   key={paramItem.variable}
                   data={paramItem}
+                  value={params[paramItem.variable] || ''}
                   onChange={value => handleParamChange(paramItem.variable, value)}
                 />
               ))}

web/app/components/tools/mcp/mcp-server-param-item.tsx

@@ -5,11 +5,13 @@ import Textarea from '@/app/components/base/textarea'
 
 type Props = {
   data?: any
+  value: string
   onChange: (value: string) => void
 }
 
 const MCPServerParamItem = ({
   data,
+  value,
   onChange,
 }: Props) => {
   const { t } = useTranslation()
@@ -24,7 +26,7 @@ const MCPServerParamItem = ({
       </div>
       <Textarea
         className='h-8 resize-none'
-        value={data.value}
+        value={value}
         placeholder={t('tools.mcp.server.modal.parametersPlaceholder')}
         onChange={e => onChange(e.target.value)}
       ></Textarea>