TalkBack/VoiceOver: Is it better to have no fallback value for accessibilityLabel of image or say ‘image’?

If for some reason 'accessibilityLabel' does not get specified on an image component would it be better to at least default to accessibilityLabel='image' or just not have any accessibilityLabel?

Trying it out with TalkBack on Android it feels like having a fallback value of plain "accessibilityLabel=image" is a better experience.