diff --git a/backend/app/__init__.py b/backend/app/__init__.py
index 552fda9..95e8745 100644
--- a/backend/app/__init__.py
+++ b/backend/app/__init__.py
@@ -3,6 +3,5 @@ AI Agent 应用模块
 """
 
 from .agent.agent_service import AIAgentService
-from .main_graph.tools.graph_tools import AVAILABLE_TOOLS, TOOLS_BY_NAME
 
-__all__ = ["AIAgentService", "AVAILABLE_TOOLS", "TOOLS_BY_NAME"]
+__all__ = ["AIAgentService"]