A #distributedlibrary is basically just a group of people that agree to lend things to each other.
That's it. Using the software, anyone who is a library member can search what has been made available for #lending, and can mark items available for lending as well!
Returns are handled just like you would borrowing a tool from your neighbor - you bring it back, you both mark you did on the app, and assuming no damage the item is ready to loan out again!