This technical note proposes a restricted methodological framework for evaluating descriptive legitimacy under finite access. It introduces an operational vocabulary for distinguishing locally legitimate descriptive transitions from illegitimate closure claims. The note focuses on access conditions, domain, stabilization, comparability, residue, genealogy, re-grounding, false authority, overpromotion, and non-global closure. The framework is intended as a claim-boundary and audit grammar for scientific, computational, and methodological descriptions. It does not introduce new physical entities, dynamics, or ontological commitments, and it does not propose a theory of time, a theory of reality, or a replacement for domain-specific scientific methods.