I think it indicates they aren't planning on monitoring people, but something more like real time monitoring of desk occupancy for monitoring if they have too many or not enough desks. I can't imagine a scenario where HR would not know about the intent to monitor staff in an organisation big enough to have HR.

However, things can still be privacy invading even if they weren't intended to be. I think it's worth fighting against privacy invasion even when (or perhaps especially when) it wasn't intended. Think of security cameras covering staff desks, intended to provide safety to staff but in reality make staff feel the opposite.