[watcher] how to list out all indices in email action in kibana?

how to list out all indices health , status index name etc in email action ?

"path" : "/_cat/indices"

i'm following below Ref.
Ref: https://www.elastic.co/guide/en/elasticsearch/reference/current/watch-cluster-status.html

Can you share more than a single line, if you are talking about a watch that you are trying to write? If you are using the cat API, it also supports a JSON format, which would allow you to read it easily in your payload.

If that is not what you are after, please provide more context!