System Reference Document

FREE ACTIONS 

Free Actions have little or no effect on the tactical situation. Typical Free Actions include speaking up to ten seconds worth of in-character dialogue (individual GMs can and will adjust this number according to their personal preference for mid-battle soliloquy) or making hand gestures (of either the tactical or just plain rude variety). 

Anything else is most likely significant enough (i.e. has enough of an impact on the unfolding tactical situation) to be counted as a Move or Attack Action, but if you think something might be insignificant enough to be a Free Action, ask your GM.