Ok, so, let me try and explain-
There’s five very very general ‘tiers’ of protective magic:
Energy shields/active-based protection: these are things that you have to constantly focus on to maintain, otherwise, the protection drops. They’re generally used to block parasites and sometimes vampires.
Wards/servitors: these are spells you create to protect you from something in particular, like injury, disease, or robbery, and function without your conscious attention to them. They’re generally used to lower the probability of getting sick, hurt, etc.
Talismans: these are layered spells you engineer to protect you from something that’s either happening or already manifest, they are anchored in manifest reality and as such are better at influencing those probabilities. They’re all-purpose.
Spirits/Demons: these are beings you have convinced or bought the services of to protect you, and will be constantly looking for probabilities of what you want to be protected from to dismantle. Most of them can tell when their charge is being divined about, and if a divination occurs about their charge in the specific context they were hired to protect from, they’re likely to retaliate.
Deities/Angels: these are beings that are protecting out of their own volition and interests, and can protect from just about every kind of threat. Not only can they tell when their charge is being read about, some can tell when their charge is being thought about. The most dangerous ones will influence those who are trying to learn about their charge, simply for fun. This includes manipulating divination results to bait potential influencers/aggressors and remove them from the cycle of life- not just death, but eternal solitude in an empty void kind of power.
Your body is a better judge of power than your mind is. So, if you feel off or weird when divining about the outcome of a particular spell, it’s safe to assume protections are in place, even if the reading gives you the affirmative. Trust your gut. You never know who has what that’s just waiting for the chance to rip into someone and scatter their very being to the winds.
Or, don’t. It’s your life, I’m just trying to provide you with the information necessary for it to keep belonging to you, rather than becoming the plaything of a bored super strong guardian.