try it yourself - add the action point gather wood and you will see what i mean. the animation works fine but the npc doesn't actually create a log and just walks holding air in his arms.
upps, seems you misunderstood me. I didn't deny this. As Benze said: the gather wood animation seems to be buggy.
whereas when you do say the throw wood into fire action point it works without you having to change anything about it. the npc will create a log and throw it on the ground without you adding anything to the inventory of the npc
This is true, isn't it? The only thing I wanted to point out is that (imho) adding items to npc inventories does not make them appear during animations performed by the npc.
There is a category
work_portable for inventory items and there are items like Box_to_carry or Broom but someone has to figure out how to use this.
edit: as far as I can see there are only two npcs who use the category work_portable in their inventory:
it's the
binduga_fisherman_basket (Fishing_basket) and the
vergen_crowd_dwarf_03 (Pickaxe).
So as a test one could replace the Fishing_basket by Box_to_carry and see what happens.