diff --git a/packages/ui/src/components/message-part.tsx b/packages/ui/src/components/message-part.tsx
index b70a68de8..1e00a9312 100644
--- a/packages/ui/src/components/message-part.tsx
+++ b/packages/ui/src/components/message-part.tsx
@@ -321,6 +321,7 @@ ToolRegistry.register({
   render(props) {
     return (
       <BasicTool
+        defaultOpen
         icon="console"
         trigger={{
           title: "Shell",