If a neighbor's build mimics my own and he were to fit to my bike, then I'd loan any one of them. Why not? They're bicycles.
My adult neighbors are highly responsible people, so I'd have no problem loaning a tool either. If their problem is bike related, then they can bring me the bike and I'll fix it for them. The only tools that I'd be concerned about loaning would be torches and the like. I'd like to see competence and safety measures before I'd let them burn down their homes. Maybe I'd come over and do the work for them.
EDIT to add that none of my children or their husbands could fit my bikes, so... As for tools, sure. Again, both husbands are respectful, mature, skilled and trustworthy.