OpenAICompatibleToolMessage tool result should be an array #4880
Description
When LLM assistant requires multiple tool_use concurrently, it will require the following tool result also be an array, with the tool_call_id matches. Otherwise it will return error like:
"error": {
"message": "An assistant message with 'tool_calls' must be followed by tool messages responding to each 'tool_call_id'. The following tool_call_ids did not have response messages: call_5lCYn0RkWOzv6sWEqhWAs0k1",
"type": "invalid_request_error",
"param": "messages.[5].role",
"code": null
}Currently it's reproducible in gpt-5 and claude 4, grok seems ok with multiple tool sections