Scenario 1: Content Review Rejection

{
  "candidates": [{ "content": { "parts": [] }, "finishReason": "STOP" }],
  "usageMetadata": { "candidatesTokenCount": 0 }
}

function detectContentReviewRejection(data) {
    if (data.usageMetadata?.candidatesTokenCount === 0) {
        return {
            isRejected: true,
            stage: 'CONTENT_REVIEW'
        };
    }
    return { isRejected: false };
}

❌ Content Review Failed

Your request was rejected during content review.

Suggestions:
✓ Check prompt for sensitive content
✓ Ensure reference images are appropriate
✓ Use positive, specific descriptions