Tulane Moves to Early Decision

One more question. If I break an ED contract, will it look bad to other colleges? Say I get no aid at ED school X, but I get a full ride at school Y, and I break my contract at X to attend Y, then will school X contact school Y and say “So and so broke the ED contract”? And is there a chance that my acceptance/scholarship at school Y will get rescinded?

This may seem like a brainless question, but I’m really sorry. I want to apply ED to Tulane, but I just want to know what I’m getting myself into