mark test_tool_message_histories_list_content as xfail until anthropi…

…c list content is supported

libs/ai-endpoints/tests/integration_tests/test_standard.py

@@ -2,6 +2,7 @@
 
 from typing import Type
 
+import pytest
 from langchain_core.language_models import BaseChatModel
 from langchain_standard_tests.integration_tests import ChatModelIntegrationTests
 
@@ -16,3 +17,7 @@ def chat_model_class(self) -> Type[BaseChatModel]:
     @property
     def chat_model_params(self) -> dict:
         return {"model": "meta/llama-3.1-8b-instruct"}
+
+    @pytest.mark.xfail(reason="anthropic-style list content not supported")
+    def test_tool_message_histories_list_content(self, model: BaseChatModel) -> None:
+        return super().test_tool_message_histories_list_content(model)