Every piece of non-text content shown to users has a text alternative that serves the same purpose. Exceptions narrow this: controls and inputs need a name describing their purpose; time-based media, tests that would be invalid as text, and sensory experiences need at least a descriptive identification; a CAPTCHA needs text identifying its purpose plus an alternative CAPTCHA in a different sensory mode; decorative, formatting-only or hidden content is implemented so assistive technology can ignore it.
This control maps to 3 controls across 1 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.
Every mapping shown was judged rather than inferred from wording similarity, and the ones that failed review are published too. See the coverage reports and what was rejected.
The graph holds this control, the 3 it maps to, and the evidence behind each claim, over MCP and REST.