Update app.py

add web_search tool

app.py

@@ -18,6 +18,16 @@ def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return
     """
     return "What magic will you build ?"
 
+@tool
+def web_search(query:str)-> str:
+    """A tool that performs web searches.
+    Args:
+        query: search query
+    """
+    search = DuckDuckGoSearchRun()
+    result = search.run(query)
+    return result
+
 @tool
 def get_current_time_in_timezone(timezone: str) -> str:
     """A tool that fetches the current local time in a specified timezone.