This is an excellent question, and will get my typical answer, but this time it's also because I'm not 100% certain of the answer. Usually it's because I'm not certain of the facts,don't want to give legal advice, and an agents statutory duty to suggest expert advice. So for four different reasons: You need to consult an attorney.
From memory I don't believe there are any questions on the "Form 17" disclosure statement which would apply, partly because I don't believe this would be a "material defect" and not an answer to a specific question. That said, advertising the view could be risky and there may be some duty to disclose that I'm not thinking of (again consult an attorney). If you do have a duty to disclose and don't, you could be sued, and that is not a good thing by any means.
One thing I do know the answer to is your agent would have to disclose it if asked. For a regular agent it would violate statutory duties and for a Realtor it would violate statutory duties and ethical rules to not disclose if asked.