Better to know in advance, sure, but he's saying if someone forgets to bring a paper or pen to a meeting that he might be unwilling to work with that person in

Better to know in advance, sure, but he's saying if someone forgets to bring a paper or pen to a meeting that he might be unwilling to work with that person in the future. Knowing these terms in advance, I think I'd decline to work with him. "...or remind you of something I've already told you, you will not work with me again"