A caption has limited space, so it helps to decide what it contributes before writing it. Repeating every visible object rarely makes a photograph more interesting. Context, a clear description or an honest account of the creative process can be more useful.
First separate what the image shows from what you know independently. A photograph may show a worktable, while the accompanying note explains why the arrangement was selected. Avoid presenting a guess about the scene as a verified fact.
Try two versions: one purely descriptive and another focused on a single editorial decision. Read each beside the image. The stronger caption is the one that helps a reader understand the purpose of the picture without overwhelming it.
Illustrations and staged scenes deserve clear labels too. A generated image can accompany an idea without being evidence of an actual place or event. Transparent wording allows the visual and the writing to support each other on honest terms.