Is the documentation of the API com.roonlabs.image:1/get_image incomplete?

Is the documentation of the API com.roonlabs.image:1/get_image incomplete ?
If we look at the requests made by Web Display, we see that the parameters are not always documented, is this normal ?

Documentation:
It is also possible to issue image requests directly using HTTP if that is more convenient:

http://IP:PORT/api/image/image_key?scale=XXX&width=XXX&height=XXX&format=XXX

https://roonlabs.github.io/node-roon-api/RoonApiImage.html

Example request:

GET /api/image/cf42323c010f4168c565351498c6a321?aspect=16by7&blur=10 HTTP/1.1