img-alt-quality
<img> alt text must be appropriate (manual review)
Flags <img> elements with non-empty alt text for human review of appropriateness.
Applies to. Applies to <img> elements whose alt attribute is present and non-empty. The element must be included in the accessibility tree, and role="presentation"/"none" takes it out of scope unless it is focusable, which restores its role. An <img> with no alt at all is img-alt-present's failure, and one with alt="" is img-alt-decorative's review.
Expectation. Human review is required to confirm that the provided text alternative is accurate and appropriate.
Examples
<img src="chart.png" alt="image">
Non-empty alt is present, but "image" restates the element type instead of describing what the chart shows — worth a reviewer's judgment.
<img src="border.png" alt="">
Empty alt marks the image decorative; that's `img-alt-decorative`'s question, not this rule's.