display text on marker only when zoomed in

Hi, I've been searching all of the docs but I don't find any thing that could do what I want. I'm trying to display some text on markers only if it's really zoomed in and don't if zoomed out. I was mainly looking for some kind of get_zoom() function, just like the set_zoom() but it looks like there isn't one.
Does anyone have some sort of solution to this?