Dynamically-Assign-Resource_Tags.json

{
    "mode": "Indexed",
    "policyRule": {
        "if": {
            "allOf": [
                {
                    "field": "[concat('tags[', parameters('tagName1'), ']')]",
                    "Equals": "[parameters('tagValue1')]"
                },
                {
                    "field": "[concat('tags[', parameters('tagName2'), ']')]",
                    "Equals": "[parameters('tagValue2')]"
                },
                {
                    "field": "[concat('tags[', parameters('managedTagName'), ']')]",
                    "notEquals": "[parameters('managedTagValue')]"
                }
            ]
        },
        "then": {
            "effect": "modify",
            "details": {
                "roleDefinitionIds": [
                    "/providers/microsoft.authorization/roleDefinitions/b24988ac-6180-42a0-ab88-20f7382dd24c"
                ],
                "operations": [
                    {
                        "operation": "addOrReplace",
                        "field": "[concat('tags[', parameters('managedTagName'), ']')]",
                        "value": "[parameters('managedTagValue')]"
                    }
                ]
            }
        }
    },
    "parameters": {
        "tagName1": {
            "type": "String",
            "metadata": {
                "displayName": "Tag Name 1",
                "description": "Name of a tag, such as 'Env'"
            }
        },
        "tagValue1": {
            "type": "String",
            "metadata": {
                "displayName": "Tag Value 1",
                "description": "Value of 'Tag Name 1', such as 'production'"
            }
        },
        "tagName2": {
            "type": "String",
            "metadata": {
                "displayName": "Tag Name 2",
                "description": "Name of a tag, such as 'App'"
            }
        },
        "tagValue2": {
            "type": "String",
            "metadata": {
                "displayName": "Tag Value 2",
                "description": "Value of 'Tag Name 2', such as 'App01'"
            }
        },
        "managedTagName": {
            "type": "String",
            "metadata": {
                "displayName": "Managed Tag Name",
                "description": "Name of the tag value to populate, such as 'MaintWindow'"
            }
        },
        "managedTagValue": {
            "type": "String",
            "metadata": {
                "displayName": "Managed Tag Value",
                "description": "Value of the tag, such as 'Sat_00:00-04:00_CDT'"
            }
        }
    }
}