You are descending through a structure that responds to being measured. Each chamber presents something to attend to. How you attend changes what you find.
You have observation tokens. Spend them carefully. The structure is ten chambers deep.
Observe
Look carefully. Costs 1 token. May change what's there.
Measure
Quantify. Costs 1 token. Accurate but constitutive.
Record
Write it down. Free. Makes it part of the archive.