Update app.py

app.py

@@ -20,8 +20,8 @@ from state import AgentState
 # --- Constants ---
 DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 
-from tools import web_search, parse_excel, ocr_image
-tool_node = ToolNode([ocr_image, parse_excel, web_search])
+from tools import ocr_image_tool, parse_excel_tool, web_search_tool
+tool_node = ToolNode([ocr_image_tool, parse_excel_tool, web_search_tool])
 
 llm = ChatOpenAI(model_name="gpt-4.1-mini", temperature=0.0)