I kind of found the soluce to this, only put some descriptions in the Dictionary. At least it works for me... I put stuff like how a lamia moves and stuff in the dictionary (don't put alot) and as long as the lamia is not directly mentioned, the extra info in the dictionary doesn't affect the memory.
Keep in mind, I'm still a newbie ... sort of... so it may not be perfect but I'll upload the world with what I mean in the discover worlds menu. It's the (trying out some 💩) world.
Edit: By "some descriptions" i mean some specific stuff you couldn't fit in the entity description itself. To bring back my lamia example, stuff like how long her tail is, how she moves and how she 'breeds', as long as there's not too much info, it should be fine.