This paper is part of the Informational Mechanics (IM) framework, a coherence- and admissibility-based approach to physical description. The document is published as part of the first public wave of IM papers, establishing the canonical axioms, scope discipline, and foundational claim boundaries of the framework. This work states the axioms and foundational commitments of Informational Mechanics, formulated within the admissible mathematical domain defined in IM-B001. It introduces no regime models, experiments, or applications.