With the recent Zabbix versions the low-level discovery became very powerful and flexible. But the host discovery is still limited to a network scan. Therefore I'd suggest to add more useful options here.

Especially an HTTP discovery which connects to an API to get a list of devices would be very helpful. This list could for example be a JSON like in the following example:

[
  {
    "name": "hs1",
    "ip": "10.0.0.101",
    "model": "U7HD",
    "adopted": true,
    "site_id": "5dcc0f6hjdf3fd42f",
    "mac": "18:e8:29:47:aa:e1"
  },
  {
    "name": "hs2",
    "ip": "10.0.0.102",
    "model": "U7HD",
    "adopted": true,
    "site_id": "5dcc0f6hjdf3fd42f",
    "mac": "18:e8:29:47:aa:e2"
  },
  {
    "name": "hs3",
    "ip": "10.0.0.103",
    "model": "U7HD",
    "adopted": true,
    "site_id": "5dcc0f6hjdf3fd42f",
    "mac": "18:e8:29:47:aa:e3"
  }
]

Each host's data contains a number of information which could then be used in the action conditions. The simple solution would be providing each host's top-level property. But using JSONPath would be a much better and more flexible alternative.

For maximum compatibility it would be also important to enable preprocessing rules which could help to transform the data into the expected form.