Responses
Nah if he's been planning to destroy the agency by himself so far, it's not like he's just gonna blab about it to the MC he just met, who hadn't even agreed to help him. What if MC tells others? ML would be done for before his plan even started. Seems he decided to talk now because he saw already how much MC hates the agency after they kidnapped Mesan.

I swear ML was planning on being one of those "mysterious and cool" guys and not revealing anything until the very last moment... then he realized that MC is legit gonna kill him if he doesn't talk and was like "Shit, can't use that card to rizz him up anymore... guess I have to use the "be honest and hope for the best" move."
If nothing else seems to work I guess he can always result to the "grovel and beg" technique lol