Generative AI tools are being used to create content, but people are skeptical of headlines labeled as AI-generated. Even if the headlines are true or made by humans, labeling them as AI-generated makes people think they are less accurate and they are less likely to share them. This is because people believe AI-generated content is fully automated without human input. The impact of labeling headlines as AI-generated is three times smaller than labeling them as false. This shows that labeling AI-generated content should be done carefully to avoid negative effects, and labels should be clear about what they mean.