diff --git a/packages/ui/src/components/message-part.tsx b/packages/ui/src/components/message-part.tsx
index 16ccd38da26..51cc53d22a6 100644
--- a/packages/ui/src/components/message-part.tsx
+++ b/packages/ui/src/components/message-part.tsx
@@ -1456,6 +1456,7 @@ ToolRegistry.register({
     return (
       <BasicTool
         {...props}
+        defaultOpen={props.defaultOpen ?? true}
         icon="console"
         trigger={{
           title: i18n.t("ui.tool.shell"),