shadow stag
More info here
How this could work in build mode there will be a setting near the resize option where you can click on a player avatar and check what they're grabbing onto maybe storage containers/drawers and or other blueprint items that will show how many items the player selecting on your base
Another idea could also be you could select the item you want to trade such as a storage drawer and the owner of the container could pick the object and give permission to pick up the storage drawer or blueprint this could prevent other people from taking other storage drawers from your base i thought this could be a good idea and this could help the trading community from not getting scammed when people need perms