Tracking containment alerts: document fields in notification mail body

Hello,
I set up a rule to send an email when a document contains a location (Point) that is contained in a specific area.
The rules triggers correctly the alert, but I haven't been able to add to the mail body field from the document.
The document is a json of this kind

{
  "_index": "index-2022.07.19",
  "_id": "2W1OFoIBvTe4_JXgv2Mc",
  "_version": 1,
  "_score": null,
  "fields": {
    "location": [
      {
        "coordinates": [
          17.4318,
          40.5679
        ],
        "type": "Point"
      }
    ],
    "myLocation": [
      "[A1234]"
    ]
  ]
}

I've tried the following notations:

{{#context.hits}}
item with id {{_source.myIDField}} entered the area at {{_source.myLocation}} 
{{/context.hits}}

and

item with id {{context.hits.0.myIDField}} entered the area at {{context.hits.0.myLocation}}

Any suggestion on how to read those field?

Thanks for any help you could provide,
S.

are you using watcher or alerting?

Kibana Alerting