Hi! Not a big deal but probably slightly confusing for the less versed Pythonista:
The docstring for deleting annotations (AnnotationClient.annotation.delete_annotation) is the same as that for updating annotations.
https://github.com/seung-lab/CAVEclient/blob/dec850dff9e0fa0a9ef8c2a0c79bf82cd2fc5b97/caveclient/annotationengine.py#L550