We have some alerts that have pretty complex trigger criteria that can be a couple of pages long. It would be great to have some kind of comments field on the and/or blocks to help explain why they are there. For instance we have a few people that set up alerts or will change them as request by the application teams. If one person creates the alert it might make sense to them, but someone coming into it without knowing the history might not understand why certain things are set a certain way. This would be useful for the same reason that comments are used in programming.