I have a simple adaptive card template that takes a variable and posts it to a Microsoft Teams Channel. However, when I’m sending my POST request I see a 202 code but nothing ends up in Teams. The template and data seem valid when using https://adaptivecards.io/designer/ I would expect a Teams message to arrive in my channel when sending the data in a POST request.

Template

{
"type": "AdaptiveCard",
"body": [
    {
        "type": "TextBlock",
        "text": "${description}",
        "wrap": true
    }
],
"$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
"version": "1.5"
}

Payload/Body

{"description": "Test message"}

Workflow

What would be the correct way to use variables in the template or send variables through a POST request?