def METHOD_NAME(cluster, image):
    out = rbd(
        "mirror",
        "image",
        "status",
        image,
        "--format=json",
        cluster=cluster,
    )
    status = json.loads(out)
    # Exapand metrics json embdeded in the peer description.
    for peer in status["peer_sites"]:
        desc = peer.get("description", "")
        if ", " in desc:
            state, metrics = desc.split(", ", 1)
            peer["description"] = {
                "state": state,
                "metrics": json.loads(metrics),
            }
    return status