check_tolerance

Check a part's toleranced dimensions against what the chosen manufacturing process can actually hold, with a capability index per dimension, DFM flags for too-tight bands and sub-minimum features, and an optional RSS stack-up, then record the verdict in the twin. Use when the user asks whether tolerances are achievable, whether a part can be machined or printed to spec, wants a DFM or tolerance review, or asks about a tolerance stack-up on a committed part.