Epihpany: what if the glyphs on the various tools indicate the materials they're made out of?
that would explain why you can see the same glyphs on different tools, and different glyphs on tools with the same function but constructed slightly differently.
this would have a role in gameplay, allowing people to approximate the sturdiness/effectiveness of various tools without having to read a description. Here's a quote that I think supports my theory:
4 looks like a good wood Slingbow, but there's going to be
multiple wood, stone, metal and gem variants, so we need something that
looks like it's more made out of one recognisable material (in this