List the visible details first
Start with details you can point to: three card shapes, a visible 7, a heart symbol or an overlapping edge. Use ordinary descriptive language. If only part of a card is visible, describe that part rather than completing it from memory. A careful observation can be incomplete without being incorrect.
Mark what the picture does not establish
A picture of cards does not by itself reveal the rules, whose cards they are or what happened before the image. Separate those questions from visible facts. Write “the card on the right is partly covered” instead of naming a hidden rank. If a caption supplies extra information, identify it as information from the caption.
Write a clear location reference
Left and right usually refer to the reader's view, but make that convention explicit if an image may be rotated. For a diagram used in a lesson, labels such as A, B and C can be more stable. Say whether you are describing a row, a stack or a single highlighted item. Avoid changing your reference point halfway through a description.
Compare two independent descriptions
Ask two readers to describe the same image before they see each other's notes. Compare the observable details first, then discuss the interpretations separately. If a difference comes from an unclear crop or tiny symbol, improve the image or its caption. The exercise is about precise communication; it is not a test of guessing hidden information or predicting an outcome.
Questions and answers
Can I describe an uncertain detail?
Yes. Mark it as uncertain and say why, such as a cropped edge or an unreadable symbol.
Should I include the caption?
Use it when helpful, but distinguish caption information from details visible in the image itself.
Is a longer description always better?
No. Include the details needed for the task and organise them clearly. Repetition can make an otherwise accurate description harder to follow.