Resolved errors

app.py

@@ -4,13 +4,13 @@ from langchain_core.runnables import RunnableLambda
 
 # Import tools
 from tools import DuckDuckGoSearchTool, WeatherInfoTool, HubStatsTool
-from retriever import load_guest_dataset
+from retriever import load_guest_dataset,GuestInfoTool
 
 # Initialize all tools
-search_tool = DuckDuckGoSearchTool()
-weather_tool = WeatherInfoTool()
-hub_stats_tool = HubStatsTool()
-guest_info_tool = load_guest_dataset()
+search_tool = DuckDuckGoSearchTool
+weather_tool = WeatherInfoTool
+hub_stats_tool = HubStatsTool
+guest_info_tool = GuestInfoTool
 
 # Define simple state container
 class AppState(dict): pass