Add clarifying comment for type annotation in bind_tools

Explains that the 'type' annotation matches LangChain's BaseChatModel API
and that runtime validation occurs in convert_to_openai_tool().

Author: fede-kamel

libs/oci/langchain_oci/chat_models/oci_data_science.py

@@ -771,6 +771,8 @@ def _process_response(self, response_json: dict) -> ChatResult:
     def bind_tools(
         self,
         tools: Sequence[Union[Dict[str, Any], type, Callable, BaseTool]],
+        # Type annotation matches LangChain's BaseChatModel API.
+        # Runtime validation occurs in convert_to_openai_tool().
         *,
         tool_choice: Optional[str] = None,
         **kwargs: Any,

libs/oci/langchain_oci/chat_models/oci_generative_ai.py

@@ -1237,6 +1237,8 @@ def _prepare_request(
     def bind_tools(
         self,
         tools: Sequence[Union[Dict[str, Any], type, Callable, BaseTool]],
+        # Type annotation matches LangChain's BaseChatModel API.
+        # Runtime validation occurs in convert_to_openai_tool().
         *,
         tool_choice: Optional[
             Union[dict, str, Literal["auto", "none", "required", "any"], bool]