No disclaimer is allowed. They can link to the misleading/wrong site only in the case that it is obviously a link.

you cannot make a safe lawnmower. However lawnmoser makers can't just put a danger label on and get by with something dangerious - they have to put on every guard they can first. Even then they often have to show in court that the mower couldn't work as a mower if they put in a guard to prevent some specific injury and thus they added the warning.

which is to say that so long as they can do something and still work as a search engine they are not allowed to use a disclaimer anyway. The disclaimer is only for when they wouldn't be a search engine.