With most woodwinds, you probably have to get your own reed for ~3,50€. But the rest can be cleaned well enough.

When my concert band lends out instruments they have to get a professional service at the local music store when you return them. They’ll replace any consumable parts that are missing, if you haven’t already.

Of course that would probably be a bit more difficult in a library setting, where the lease lasts only a very short time.