chore: Fix integration test

Author: anubhav756

packages/toolbox-core/tests/test_e2e.py

@@ -245,7 +245,7 @@ async def test_tool_signature_is_correct(self, toolbox: ToolboxClient):
         assert sig.parameters["email"].annotation is str
 
         # The optional parameter should have a default of None
-        assert sig.parameters["data"].default is "row2"
+        assert sig.parameters["data"].default is None
         assert sig.parameters["data"].annotation is Optional[str]
 
         # The optional parameter should have a default of None