Libraries of Things are a thing now. The items that are most useful are those that lend things that you use from once a year to every couple of years.
My local library (PEI Library Service) has a telescope, radon detector, a basic (and I mean basic) toolkit, some gardening tools among other things. The collection has a couple of surprises, but mostly underwhelming.
I did request something more practical, like a bicycle disc brake flushing kit, but this has not happened yet.
> a bicycle disc brake flushing kit
With the right gear, the job is still horrible. SRAM brakes give me an unlimited number of maintenance chores.
Auto part stores often will lend both weird and specialized tools, and relatively basic ones, too.
Usually the way it works is you "buy" the tool and then "return" it.
I can hardly think of a worse thing than a bleed kit to lend out from a library. They're full of small parts to lose, and they'll never be clean once you use them. And you don't want people mixing up the DOT and mineral oil bleed kits.
I have worked in a bike shop as a mechanic, and we periodically ended up misplacing the various adapters. This is in a place where everybody using the kit is getting paid to do the job and has been trained. The librarians would go nuts just replacing O-rings and adapters that people had lost.
If you need one for your specific bike, you're probably as well off just buying the one you need from e.g. bleedzone.com [0]. Most of them are around or under $25, and if it's your kit, you always know who the last idiot to use it was :-)
[0] I haven't bought from them, but probably will when I need one. The shop I worked in has sadly closed.