OCI Generative AI tool_call_id not found because AIMessage.tool_calls are ignored

[jbrown9513]

Title:
Tool calling: toolCallId not found in 'toolCalls' of previous message when AIMessage.tool_calls is set but additional_kwargs["tool_calls"] is not
Affected package/module:
langchain-oci → chat_models/oci_generative_ai.py messages_to_oci_params

Setup:
chatgpt-5 model
Langchain React Agent
Single MCP tool, called by Agent.

Error:
Error in user chat: {'target_service': 'generative_ai_inference', 'status': 400, 'code': '400', 'opc-request-id': 'message': "Invalid parameter: 'toolCallId' of 'call_EsOkIHqkAwxiuLEifKYpFuiz' not found in 'toolCalls' of previous message.", 'operation_name': 'chat', 'timestamp': '2025-10-10T16:57:01.747572+00:00', 'client_version': 'Oracle-PythonSDK/2.159.1', 'request_endpoint': 'POST https://inference.generativeai.us-chicago-1.oci.oraclecloud.com/20231130/actions/chat', 'logging_tips': 'To get more info on the failing request, refer to https://docs.oracle.com/en-us/iaas/tools/python/latest/logging.html for ways to log the request/response details.', 'troubleshooting_tips': "See https://docs.oracle.com/iaas/Content/API/References/apierrors.htm#apierrors_400__400_400 for more information about resolving this error. Also see https://docs.oracle.com/iaas/api/#/en/generative-ai-inference/20231130/ChatResult/Chat for details on this operation's requirements. If you are unable to resolve this generative_ai_inference issue, please contact Oracle support and provide them this full error message."}

Root Cause:
Class: GenericProvider
Function: messages_to_oci_params

The function only forwards tool calls when message.additional_kwargs.get("tool_calls") is truthy, ignoring the standard AIMessage.tool_calls field. This drops the assistant’s toolCalls from the prior message, so the next tool message’s tool_call_id cannot be resolved by OCI.

for message in messages: role = self.get_role(message) if isinstance(message, ToolMessage): # For tool messages, wrap the content in a text content object. tool_content = [ self.oci_chat_message_text_content(text=str(message.content)) ] if message.tool_call_id: oci_message = self.oci_chat_message[role]( content=tool_content, tool_call_id=message.tool_call_id, ) else: oci_message = self.oci_chat_message[role](content=tool_content) elif isinstance(message, AIMessage) and message.additional_kwargs.get( "tool_calls" ... ):
The last line should be something like:
if isinstance(message, AIMessage) and (message.tool_calls or message.additional_kwargs.get("tool_calls")):

I have verified the fix locally, and will post a PR.