standard-tests[patch]: improve runnable tool description (#24210)

libs/standard-tests/langchain_standard_tests/integration_tests/chat_models.py

@@ -191,12 +191,22 @@ class ChatModelIntegrationTests(ChatModelTests):
             pytest.skip("Test requires tool calling.")
 
         prompt = ChatPromptTemplate.from_messages(
-            [("human", "Hello. Please respond in the style of {answer_style}.")]
+            [
+                ("system", "Repeat what the user says in the style of {answer_style}."),
+                ("human", "{user_input}"),
+            ]
         )
         llm = GenericFakeChatModel(messages=iter(["hello matey"]))
         chain = prompt | llm | StrOutputParser()
-        model_with_tools = model.bind_tools([chain.as_tool()])
-        query = "Using the tool, ask a Pirate how it would say hello."
+        tool_ = chain.as_tool(
+            name="repeat_in_answer_style",
+            description="Repeat the user_input in a particular style of speaking.",
+        )
+        model_with_tools = model.bind_tools([tool_])
+        query = (
+            "Using the repeat_in_answer_style tool, ask a Pirate how they would say "
+            "hello."
+        )
         result = model_with_tools.invoke(query)
         assert isinstance(result, AIMessage)
         assert result.tool_calls