Update app.py

Create very simple first tool

app.py

@@ -9,14 +9,14 @@ from Gradio_UI import GradioUI
 
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
-def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return type
+def dk_first_tool(arg1:str, arg2:str)-> str: #it's import to specify the return type
     #Keep this format for the description / args / args description but feel free to modify the tool
-    """A tool that does nothing yet 
+    """A tool that concatenates two strings 
     Args:
-        arg1: the first argument
-        arg2: the second argument
+        arg1: the first string
+        arg2: the second string
     """
-    return "What magic will you build ?"
+    return arg1+arg2
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str:
@@ -55,7 +55,7 @@ with open("prompts.yaml", 'r') as stream:
     
 agent = CodeAgent(
     model=model,
-    tools=[final_answer], ## add your tools here (don't remove final answer)
+    tools=[final_answer, dk_first_tool], ## add your tools here (don't remove final answer)
     max_steps=6,
     verbosity_level=1,
     grammar=None,