I'm inclined to approve this since it works and doesn't seem to violate any guidelines. One question though--when testing, I forgot to add this to secure.trusted_mods, and mod security was enabled... but the mod still functioned with no complaints. Is whitelisting this mod actually necessary, and if so what for?
Typically I'm running a version off of git, so just to confirm I also loaded this in a fresh copy of minetest 5.0.1 in the development test game. No issues with mod security there either (although I couldn't generate a code since the wool mod isn't present there, you should probably add a dep for that)