The symptom is specific: aI alt text describes details unrelated to the image's purpose. Start with the affected item and identify the decision or input that could produce this behavior.
Find the likely cause
The model inventories the scene without considering context.
Treat this as an explanation to verify against the actual work. Look at the input, the relevant decision, and the final result together. If the evidence does not support this diagnosis, investigate the mismatch before applying a convenient but unrelated fix.
Make the targeted correction
Describe the information the image contributes to the page.
Images should contribute to the page's explanation and remain understandable in the contexts where readers encounter them.
Check that the repair worked
A reader using the text alternative should receive the relevant meaning.
Repeat the check on the final version that the reader or customer will encounter. An approved draft, a preview, and a published result can differ; the acceptance decision should concern the version people actually use.
Prevent the next related failure
A separate issue to watch for is this: decorative images receive distracting verbose descriptions. Distinguish decoration from meaningful content when implementing text alternatives.
Monitor the useful outcome
Track image loading issues, accessibility defects, and whether illustrations help readers complete the task.
Keep a short record of the original symptom, the evidence behind the diagnosis, and the result of the acceptance check. That record makes the solution reusable when the same condition appears again, without assuming that every superficially similar problem has the same cause.
Official reference for the platform or standard discussed: W3C WAI: image alternatives.