Ktor Plugin OpenApi documentation configuration

Greetings.

I am using the Ktor-Plugin to generate a documentation.yml of the embedded ktor server:
https://www.jetbrains.com/help/idea/ktor.html#generate-openapi

It would be nice to have extra fields in the documentation.yml instead of only “description” that is generated out of the java doc.
Is there a possibility to add extra fields like “summary” and other parameter as used e.g. in swagger.

Preferable would be a way to add to java doc or annotate above route functions.

Can I find more documentation of ktor-plugin than in the link above?

Thank you very much.