Update app.py

app.py

@@ -5,8 +5,18 @@ import pytz
 import yaml
 from tools.final_answer import FinalAnswerTool
 
+import codecs
+
 from Gradio_UI import GradioUI
 
+@tool
+def rot13(text:str)->str:
+    """ A tool that encrypts text using rot13.
+    Args:
+        text: str that will be encrypted.
+    """
+    return codecs.encode(text, 'rot_13')
+
 # 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