Yes, there is motion there, it means nothing really. There is supposed to be a rubber grommet there, but it's not vital.
So of course now, you have something to consider--that fluid didn't just evaporate, you have a leak somewhere in the clutch hydraulic system. If it was from the master, you will see that fluid has leaked down the INSIDE of your firewall where the MC rod comes thru to attatch to your pedal. If it was from the dreaded internal slave, it will be dripping out of your bellhousing.
Easy to replace the master cyl, but generally if that was the problem component, the internal slave will die shortly thereafter. Generally I recommend replacing both at the same time, but it is troublesome to replace the internal slave since you have to pull the tranny, so count on doing everything you can think of while you have it apart like new clutch, pressure plate, etc, and since you have the 2.5L it's a good time to replace the rear main seal which on your engine requires the transmission to be out.
If you do replace the internal slave, don't go with aftermarket, go with OEM even if you have to go to the dealership and pay more. There is a glut of threads on here over the years with tales of woe about new internal slave that are defective out of the box, some folks have done this twice in a row and finally the 3rd time they pull their trans, they go OEM. Of course, there will be those who will chime in and tell you "I got a discount internal slave for $23 and it's been going fine for _________ " (enter long duration of time, or obscenely large amt of miles here).
They just got lucky. It's not the norm.
Look at the picture in post #3. http://www.jeepforum.com/forum/f12/c...cement-728960/