Ida-Tyr:
So if I am right to get more info need to spend some investigative ability points.
Does spending 1 point in Spirit Sight for Ida-Tyr to get more information on the observing spirits/creatures/natural anomaly make sense?
What sort of narration do you want for that GM?
Correct!
Any narration as you see fit. The rules say that Spirit Sight allows one to peer into the edges of the spirit world, discover areas of corruption, and discover hauntings. It's possible to look too closely and take morale damage as well.
If you truly wanted to show off your sorcerous chops, you could also spend corruption, although that's even more dangerous.
Your call!