Tony Vargas
Legend
Yes, that'd be good.If *all* spells were ‘tagged’ with ‘descriptors’ that identified their ‘theme’, their ‘domain’ (fire, wind, ether, force, charm, teleport, animal, plant, fate/luck/prescience, etcetera), it would be much easier for DMs to allow a character concept to access them. It would also be easier for the DM to ban a list of spells across levels, because the theme was inappropriate for the setting, maybe nonpsychic or nonelemental or nonnature or too flashy, or whatever.
It still might not help much with the particular brand of 'low-fantasy' with this ideal of less-overt/plausibly-deniable magic. D&D magic tends to be pretty darn overt. You wave your hands around, speak arcane syllables, material components disappear and magical effects happen. Subtlety is not a D&D caster's watch-word. 3e added Silent & Still Spell meta-magic feats, 4e did away with components & let you re-skin, and the 5e Sorcerer gets 'subtle' metamagic, but that's about as far as it's ever gone that I'm aware of.