The news site yes. Otherwise HN rules are you have to add the exact article title to your submission, only exception is if it is too long.

> Otherwise please use the original title, unless it is misleading or linkbait; don't editorialize.

https://news.ycombinator.com/newsguidelines.html

I think a case can be made for it being slightly misleading. Also there is not mention of title length that I can see.

Length is enforced when submitting; titles that are too long generate a message about how many characters they are too long by and the [Submit] button is invalidated until shortened.