Currently, Canvas automatically adds the filename of an image into the Alternative Text field when the image is added via the Rich Content Editor. According to accessibility guidelines, the image's filename alone (e.g., "myfile.jpg") does not satisfy the requirements for alternative text. However, by adding it automatically Canvas currently gives the user a false sense of security that the alternative text requirement has been satisfied.
Canvas should leave the Alternative Text field blank by default, but it should also not allow the user to save the image options until some text is entered that is not the name of the file (or ends with a file extension). Why? Accurate alternative text is a cornerstone of web accessibility. Canvas should not be "cutting corners" by providing false information to users about their accessibility responsibilities.
