should fix various bugs in previous commit

app.py

@@ -9,10 +9,14 @@ from Gradio_UI import GradioUI
 
 
 @tool
-def xkcd_tool(id:int)-> str:
+def xkcd_tool(id:int = 0)-> str:
     """A tool that fetches XKCD comics. For the latest comic do not pass an id argument.
     This tool will return the requested comic title, alt text, and a url which points to the comic image.
-    Compute a Markdown string that displays the title as a header, the alt text as a blockquote, and the image as an image and return that as your final answer.
+    Create a Markdown version of the comic with the following requirements:
+    - The title should be a level 1 header.
+    - The alt text should be a blcokquote.
+    - The image should be displayed. using the following syntax: ![alt text](img_url)
+    The Final Answer should be This markdown string
     Args:
         id: a number representing a valid XKCD comic ID, or none for the latest comic.
     """