Update 1 added multiple hand slots to the player inventory. A very welcome feature, but it lacks the option to return to empty hands easily.
While building, I find it quite irritating to have a tool or weapon equipped. It obstructs the view, and plays its startup animation every time you exit out of build or erase mode.
Currently the only way to return to empty hands is to remove the tool from the currently active slot, which is just awkward.
So my suggestion is that, when cycling through equipped tools, there is an "empty hands" slot added to the rotation. It should not be visible in the inventory UI, as it will always be empty.