What A Vault Means Here
Start with the noun before the lane language.
A vault is a controlled holding posture for an asset: what is held, where it belongs, and what evidence Bridge has for it.
A vault label should make clear what rule can move the asset and what rule stops it from moving.
A Bridge vault is not a public yield vault, redemption promise, reserve guarantee, or claim that a user can withdraw on demand.
Plain version: a pool is inventory Bridge can quote from; a lane is the route an asset may travel; a receipt is evidence something happened; a vault is the controlled holding posture around an asset.
