I had a client with Monitors that were using external addresses to access their resources. Those addresses were being NATed or redirected to internal addresses inside the private network. Client needed the Alerts being triggered to include the internal address of the systems. Here's what I suggested, which might be useful in similar scenarios:
Alert Action Tokens are designed to gather values from the failing Monitor. Having that said, in order to gather a fictional value from the Monitor, you will need to enter the fictional value within a field that will accept such a value. Three fields come to mind:
Sincerely,
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