Well, I'm not in a shop, I just have my own tools at my house workshop. I think I'd say someone could come over and use the tool in my workshop...unless I didn't know them that well or thought they were sketchy...or just say that I don't lend out tools outside my workshop because, in the past, they tend to walk or not be there when I need them. I had this happen before, so it isn't a lie. People who know you and are friends with you will get it - maybe even welcome the chance to stop by and hang out for a bit. People who don't know you or are otherwise sketchy might get miffed or indignant, but I'm not going to worry about that. This does require you feel comfortable saying no, in some form (which a lot of people aren't). There are some things you shouldn't ask people, anyway, too soon in knowing them...this, helping someone move, rides to/from the airport, and I'm sure there are others. People who casually push these boundaries tend to take far more than they give.