Update app.py

Formatting for tool

app.py

@@ -146,8 +146,13 @@ def summarize_and_answer_from_web(url: str, question:str) -> str:
     
     return summary, answer
     #return answer
-
-def tool_visit_webpage(url:str):
+@tool
+def tool_visit_webpage(url:str) -> str:
+    '''
+    A tool used to visit a webpage, and return the appropriate information from it
+    Args
+      url: A string url, the site to be visited
+    '''
     vst = VisitWebpageTool()
     ret = vst(url)
     return ret