diff --git a/frontend/app/[locale]/agents/components/AgentSelectorHeader.tsx b/frontend/app/[locale]/agents/components/AgentSelectorHeader.tsx
index c7e1d2e8e..7f23f6ddc 100644
--- a/frontend/app/[locale]/agents/components/AgentSelectorHeader.tsx
+++ b/frontend/app/[locale]/agents/components/AgentSelectorHeader.tsx
@@ -594,9 +594,8 @@ export default function AgentSelectorHeader({
               }}
               getPopupContainer={(triggerNode) => triggerNode.parentNode as HTMLElement}
               styles={{
-                root: { 
-                  minWidth: 0, 
-                  width: '100%', 
+                root: {
+                  width: 'calc(100% - 32px)',
                 }
               }}
             >
@@ -614,12 +613,12 @@ export default function AgentSelectorHeader({
                 <div className="flex-1 min-w-0 mx-2">
                   <div className="text-lg font-medium text-gray-900 leading-tight mb-2">
                     {isCreatingMode
-                      ? t("subAgentPool.button.create")
+                      ? t("agent.action.create")
                       : currentAgent?.display_name || currentAgent?.name || t("agentConfig.agents.selectAgent")}
                   </div>
                   <div className="text-sm text-gray-500 leading-tight truncate">
                     {isCreatingMode
-                    ? t("subAgentPool.button.create")
+                    ? t("agent.action.createOrSelect")
                     : currentAgent?.description || t("agentConfig.agents.noAgentSelected")}
                   </div>
                 </div>
diff --git a/frontend/public/locales/en/common.json b/frontend/public/locales/en/common.json
index 8ca717260..3b8266d61 100644
--- a/frontend/public/locales/en/common.json
+++ b/frontend/public/locales/en/common.json
@@ -356,6 +356,7 @@
   "agent.prompts.noPermission": "You do not have permission to view prompts.",
   "mcpConfig.permission.noEdit": "No permission to edit MCP",
   "agent.action.create": "Create Agent",
+  "agent.action.createOrSelect": "Create Agent or Use Dropdown to Select Another Agent",
   "agent.action.modify": "Edit Agent Information",
   "agent.action.view": "View Agent Information",
   "agent.action.viewCallRelationship": "View Call Relationship",
diff --git a/frontend/public/locales/zh/common.json b/frontend/public/locales/zh/common.json
index bacb6cbea..c45e0f765 100644
--- a/frontend/public/locales/zh/common.json
+++ b/frontend/public/locales/zh/common.json
@@ -358,6 +358,7 @@
   "agent.prompts.noPermission": "您无权查看提示词内容。",
   "mcpConfig.permission.noEdit": "无MCP编辑权限",
   "agent.action.create": "创建智能体",
+  "agent.action.createOrSelect": "创建智能体或下拉选择一个智能体",
   "agent.action.modify": "编辑智能体信息",
   "agent.action.view": "查看智能体信息",
   "agent.action.viewCallRelationship": "查看调用关系",