> Poisoner’s Kit is conflated into Thievery (although you could make a case for a separate skill).
I think you should instead conflate it into Medicine (which I would favor keeping separate from Lore). You might also allow it to be done under Survival if the poison is a naturally occurring thing that a well-informed survivalist would know is poisonous. Of course delivering the poison could be a species of Stealth. e.g.
"This is a Calisto Pulse. It can disarm micro-explosives from up to twenty feet."
"What kind of micro-explosives?"
"The kind I just put in your wine."