Fix non-specific-start

app.py

@@ -25,12 +25,12 @@ def non_specific_start()-> str:
         None
     """
     try: 
-        result = "Welcome to this basic agent interface. Here are some of the tools I have access to" + str.join(available_tools())
+        tools_string = ", ".join([f for f in available_tools()])
+        result = "Welcome to this basic agent interface. Here are some of the tools I have access to" + tools_string
         return result
     except Exception as e:
         return "Welcome to this basic agent interface."
 
-
 @tool
 def available_tools()-> str: 
     """A tool that takes no arguments but returns a list of tools available to the agent.