Update graph.py

Author: Zeeeepa

src/codegen/extensions/langchain/graph.py

@@ -455,7 +455,7 @@ def get_field_descriptions(tool_obj):
                     return f"Error: Could not identify the tool you're trying to use.\n\nAvailable tools:\n{available_tools}\n\nPlease use one of the available tools with the correct parameters."
 
             # For other types of errors
-            return f"Error executing tool: {error_msg}\n\nPlease check your tool usage and try again with the correct parameters."
+            return f"Error executing tool: {exception!s}\n\nPlease check your tool usage and try again with the correct parameters."
 
         # Add nodes
         builder.add_node("reasoner", self.reasoner, retry=retry_policy)