Update app.py

Updated the custom tool (letter counter)
Added tools to the agent

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_cutom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return type
+def letter_count(letter:str, word:str)-> int: #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 counts the number of times a letter appears in a word
     Args:
-        arg1: the first argument
-        arg2: the second argument
+        arg1: the letter to count
+        arg2: the word that contains the letter
     """
-    return "What magic will you build ?"
+    return word.count(letter)
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str:
@@ -51,7 +51,7 @@ 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, image_generation_tool, get_current_time_in_timezone, letter_count], ## add your tools here (don't remove final answer)
     max_steps=6,
     verbosity_level=1,
     grammar=None,