I wouldn't. I would first try to record them with as natural of a sound as possible and then use volume to make it sit well in the mix. Tambourines, shakers, etc. can also be panned to the side a bit if it's stepping on other tracks.
I would only use eq on a tambourine or shaker to remove excess brittleness at the high end or perhaps to muddy it up a bit if I wanted it to get lost in the mix a little. Also I'd probably use a little bit of low cut to remove any rumble present in the recording. Basically I would only use eq to remove from the recorded track what should not be there (but was captured in the recording process) and not for 'shaping' the sound of the tambourine/shaker itself. For that I would use mic placement and playing technique (for example if I want a shaker to be less bright I cup it in the hands a little more and hold a little tighter, and when I want it really bright I might hold it lightly with the fingertips).