why can't louis read armand's mind?

🚨 season 2 spoilers 🚨

just realised that while armand reads louis' thoughts often in season 2, louis doesn't read his at all?? have i missed something why he can't read his mind bc i feel like louis could have caught onto the whole plotting their deaths thing if he could?? is it just because armand is so ancient and powerful he's really good at veiling his thoughts?