System.ClientModel.ClientResultException: 'HTTP 400 (invalid_request_error: array_above_max_length)

[Raivr-dev]

Service

OpenAI

Describe the bug

When AllowParallelToolCalls is true and more than 128 ToolChatMessages are sent back to the AI, this exception is thrown:

System.ClientModel.ClientResultException: 'HTTP 400 (invalid_request_error: array_above_max_length)
Parameter: messages[2].tool_calls

Invalid 'messages[2].tool_calls': array too long. Expected an array with maximum length 128, but got an array with length 200 instead.'

Steps to reproduce

Set AllowParallelToolCalls to true in the ChatCompletionOptions object.
Prompt the AI such that it's going to call your ChatTool more than 128 times.
This call will then generate the exception: chatClient.CompleteChat(messages, options);

Code snippets

No response

OS

Windows 11

.NET version

9.0

Library version

2.1.0