Currently, the API raises an error when I set "tool_choice" to {"type": "none"} while the tools parameter is empty.

I think this behavior makes sense in most cases. However, there is a scenario where I describe tool information in a private prompt, such as a system prompt. Sometimes, based on the code context, I want to explicitly forbid function calls.

It's easy for me to set tool_choice to {"type": "none"} because it's a structured parameter. On the other hand, modifying the system prompt is more difficult since it's written in natural language.

So, will Anthropic allow setting tool_choice to "none" even when tools is not empty in the future?