added wikipedia tool, switched back to duckduckgo

tools.py

@@ -1,11 +1,12 @@
-from smolagents import DuckDuckGoSearchTool, VisitWebpageTool, GoogleSearchTool
+from smolagents import DuckDuckGoSearchTool, VisitWebpageTool, GoogleSearchTool, WikipediaSearchTool
 
 
 
 def initialize_all_available_tools():
     return [
-        # DuckDuckGoSearchTool(),
-        GoogleSearchTool(provider="serper"),
-        VisitWebpageTool()
+        DuckDuckGoSearchTool(),
+        # GoogleSearchTool(provider="serper"),
+        VisitWebpageTool(),
+        WikipediaSearchTool()
     ]