These criteria are specific to any HTML content.
Given I am a keyboard user, when I encounter interactive content then I can control it solely from the keyboard.
Given I am a screen magnifier user, I can move the mouse cursor onto tooltip content without the content disappearing
Given I use a browser to view web content, when I load a new page then I can understand the page content from the title.
Given I navigate with a keyboard, when I Tab to links and form controls then I can locate where I am on the page.
Given I navigate with assistive technology when I encounter content that looks different then I can perceive this difference. E.g. including (but not limited to) heading structure, ordered and unordered lists.
Given I use a screen reader, when I focus on form controls then I can understand the label, an inline error, and what type of data is required.
Given I use a screen reader, when a visual change occurs on the page then I can understand the change audibly. E.g. search results displaying while searching, an error summary displaying after activating the submit button.
Given I use browser zoom, when I zoom up to 400% then I can understand and interact with page content.
Given I use a screen reader, when I encounter a descriptive image then I can understand the image non-visually.
Given I use mobile devices, when I orientate the screen from portrait to landscape then I can understand the content when it's reflowed.