Well, AFAIK, there hasn’t been a ToS for years. It was superseded by the EULA. And as far as the actual wording on what is considered actionable, check the official documentation:
Which points to the post quoted above as the official forum post.
“We will now additionally prohibit the use of all software and hardware mechanisms to mirror commands to multiple World of Warcraft accounts at the same time, or to automate or streamline multi-boxing in any way.”
Especially note, “streamline multi-boxing in any way,” and I’d loop right back to: