Shouldn't Hades be considered affably evil instead of faux affably evil? on Disney wiki, it acknowledges that despite his evilness, he is an honest god because he holds his ends of the bargain without finding loopholes.
Idk how to explain it but he isn't genuinely polite he uses good manners to superficially lure people into deals, another example is shen, he's honorable because he kept his word and never used dirty tactics, but he still was not genuinely polite