Cuff links are fine in everyday business wear, but I would NOT wear them for interviews at b-school or otherwise. Same goes with pocket squares, flashy socks, etc. I own all these things and they are a part of my personality, but when it comes to interviewing you don't want to stand out for the wrong reasons. I think cuff links would be fine for something like an information session or something more casual even though they are generally thought to be more formal. I would go with something like fabric knot links instead of flashy metal generally.
As far as suits go, the pieces must match. If they don't then you are not wearing a suit, but a pants and sportcoat. Do NOT wear a black suit under any circumstance unless it is a formal event, a funeral, or you work in the hospitality industry. Some people may disagree with this statement, but trust me, knowing that some of the guys at top banks and consulting firms are knowledgeable of fashion, they all know this rule and you don't want to stand out for the wrong reasons. Stick with something conservative: plain charcoal/gray or blue or something subtle if it is a pinstripe.
Cufflinks, contrast cuffs, bold pinstripes all say executive. You are not one yet, so don't act like it. Tie bars and pocket squares say fashion forward, not conservative.
And above all, if you are interviewing at Tuck, shouldn't you just wear your bow-tie?