Update app.py

Changed typing to help the models to get to the right conclussion

app.py

@@ -6,7 +6,7 @@ from smolagents import CodeAgent, HfApiModel, load_tool, tool
 import yaml
 import wikipedia
 from tools.final_answer import FinalAnswerTool
-
+from typing import List
 from Gradio_UI import GradioUI
 
 
@@ -18,9 +18,9 @@ from Gradio_UI import GradioUI
 # from Gradio_UI import GradioUI
 
 @tool
-def search_wikipedia_pages(search_string: str) -> str:
+def search_wikipedia_pages(search_string: str) ->  List[str]:
     """This tool helps to search for wikipedia pages related to a search string. 
-    The output are the first 10 pages related to the search string.
+    The output are the first 10 pages related to the search string in a list of strings.
     Args:
         search_string: the search string
     """