Each web page satisfies the five Level AA conformance conditions that WCAG 2.1 sets: it reaches the level itself or through a conforming alternate version, conformance covers whole pages and every step of a process, only accessibility-supported uses of technology are relied on, and nothing interferes, under which even content that is not relied on must not break audio control, keyboard trap, pause stop hide or the three-flash limit.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.