Update app.py

app.py

@@ -89,6 +89,16 @@ class BasicAgent:
         }
 
     def search_tool(question: str, max_length: int = 1024) -> str:
+        """
+            Search info in the web.
+            
+            Args:
+                question: Question string
+                max_length: Maximum length of response (default 1024 chars)
+            
+            Returns:
+                A single string containing the info from the web.
+        """
         search = DuckDuckGoSearchRun()
         return search.invoke(question)[:max_length]