I'd like to suggest that prior to expressing disagreement you really ought to reread the comment you're replying to and make sure your understanding is correct.

Quoting this for the second time now - tool use requires a harness.

Without a harness the LLM has no ability to interact with the world. It has no agency. It's just spitting out text (or whatever else) into the void. There's no programming tools, no filesystem, no shell, nothing.