{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/DescribeAlarmHistoryInput",
  "title": "DescribeAlarmHistoryInput",
  "type": "object",
  "properties": {
    "AlarmName": {
      "type": "string",
      "minLength": 1,
      "maxLength": 255,
      "description": "The name of the alarm.",
      "example": "example_value"
    },
    "AlarmTypes": {
      "type": "array",
      "items": {
        "type": "string",
        "enum": [
          "CompositeAlarm",
          "MetricAlarm"
        ]
      },
      "description": "Specify this parameter to receive information only about alarms of the specified types.",
      "example": []
    },
    "HistoryItemType": {
      "type": "string",
      "enum": [
        "ConfigurationUpdate",
        "StateUpdate",
        "Action"
      ],
      "description": "The type of alarm histories to retrieve.",
      "example": "ConfigurationUpdate"
    },
    "StartDate": {
      "type": "string",
      "format": "date-time",
      "description": "The starting date to retrieve alarm history.",
      "example": "2026-01-15T10:30:00Z"
    },
    "EndDate": {
      "type": "string",
      "format": "date-time",
      "description": "The ending date to retrieve alarm history.",
      "example": "2026-01-15T10:30:00Z"
    },
    "MaxRecords": {
      "type": "integer",
      "minimum": 1,
      "maximum": 100,
      "description": "The maximum number of alarm history records to retrieve.",
      "example": 10
    },
    "NextToken": {
      "type": "string",
      "description": "The token returned by a previous call.",
      "example": "example_value"
    },
    "ScanBy": {
      "type": "string",
      "enum": [
        "TimestampDescending",
        "TimestampAscending"
      ],
      "description": "Specified whether to return the newest or oldest alarm history first.",
      "example": "TimestampDescending"
    }
  }
}