For requesting NPC commands
oh... and before I forget maybe in the Communication with them mention the other commands like ! and ; as ways to interact with them.
>>>>
Fell trees to:
Fell tall trees (for tree trunks)
Fell young trees (for slender rods)
Add cut trunk into blocks (alternate to boards)
Make stakes (out of slender trees)
(This would allow the helper to be a good partner when laying a long trap fence)