{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/MetricAlarm",
  "title": "MetricAlarm",
  "type": "object",
  "description": "The details about a metric alarm.",
  "properties": {
    "AlarmName": {
      "type": "string",
      "minLength": 1,
      "maxLength": 255,
      "description": "The name of the alarm.",
      "example": "example_value"
    },
    "AlarmArn": {
      "type": "string",
      "minLength": 1,
      "maxLength": 1600,
      "description": "The Amazon Resource Name (ARN) of the alarm.",
      "example": "example_value"
    },
    "AlarmDescription": {
      "type": "string",
      "maxLength": 1024,
      "description": "The description of the alarm.",
      "example": "example_value"
    },
    "AlarmConfigurationUpdatedTimestamp": {
      "type": "string",
      "format": "date-time",
      "description": "The time stamp of the last update to the alarm configuration.",
      "example": "2026-01-15T10:30:00Z"
    },
    "ActionsEnabled": {
      "type": "boolean",
      "description": "Indicates whether actions should be executed during any changes to the alarm state.",
      "example": true
    },
    "OKActions": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 5,
      "description": "The actions to execute when this alarm transitions to the OK state.",
      "example": []
    },
    "AlarmActions": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 5,
      "description": "The actions to execute when this alarm transitions to the ALARM state.",
      "example": []
    },
    "InsufficientDataActions": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 5,
      "description": "The actions to execute when this alarm transitions to the INSUFFICIENT_DATA state.",
      "example": []
    },
    "StateValue": {
      "$ref": "#/components/schemas/StateValue"
    },
    "StateReason": {
      "type": "string",
      "maxLength": 1023,
      "description": "An explanation for the alarm state, in text format.",
      "example": "example_value"
    },
    "StateReasonData": {
      "type": "string",
      "maxLength": 4000,
      "description": "An explanation for the alarm state, in JSON format.",
      "example": "example_value"
    },
    "StateUpdatedTimestamp": {
      "type": "string",
      "format": "date-time",
      "description": "The time stamp of the last update to the value of either the StateValue or StateReasonData.",
      "example": "2026-01-15T10:30:00Z"
    },
    "MetricName": {
      "type": "string",
      "minLength": 1,
      "maxLength": 255,
      "description": "The name of the metric associated with the alarm.",
      "example": "example_value"
    },
    "Namespace": {
      "type": "string",
      "minLength": 1,
      "maxLength": 255,
      "description": "The namespace of the metric associated with the alarm.",
      "example": "example_value"
    },
    "Statistic": {
      "$ref": "#/components/schemas/Statistic"
    },
    "ExtendedStatistic": {
      "type": "string",
      "description": "The percentile statistic for the metric associated with the alarm.",
      "example": "example_value"
    },
    "Dimensions": {
      "type": "array",
      "items": {
        "$ref": "#/components/schemas/Dimension"
      },
      "maxItems": 30,
      "description": "The dimensions for the metric associated with the alarm.",
      "example": []
    },
    "Period": {
      "type": "integer",
      "minimum": 1,
      "description": "The period, in seconds, over which the statistic is applied.",
      "example": 10
    },
    "Unit": {
      "$ref": "#/components/schemas/StandardUnit"
    },
    "EvaluationPeriods": {
      "type": "integer",
      "minimum": 1,
      "description": "The number of periods over which data is compared to the specified threshold.",
      "example": 10
    },
    "DatapointsToAlarm": {
      "type": "integer",
      "minimum": 1,
      "description": "The number of data points that must be breaching to trigger the alarm.",
      "example": 10
    },
    "Threshold": {
      "type": "number",
      "format": "double",
      "description": "The value to compare with the specified statistic.",
      "example": 42.5
    },
    "ComparisonOperator": {
      "$ref": "#/components/schemas/ComparisonOperator"
    },
    "TreatMissingData": {
      "type": "string",
      "enum": [
        "breaching",
        "notBreaching",
        "ignore",
        "missing"
      ],
      "description": "Sets how this alarm is to handle missing data points.",
      "example": "breaching"
    },
    "EvaluateLowSampleCountPercentile": {
      "type": "string",
      "description": "Used only for alarms based on percentiles.",
      "example": "example_value"
    },
    "Metrics": {
      "type": "array",
      "items": {
        "$ref": "#/components/schemas/MetricDataQuery"
      },
      "description": "An array of MetricDataQuery structures for metric math expressions.",
      "example": []
    },
    "ThresholdMetricId": {
      "type": "string",
      "description": "If the value of this field is set to an alarm metric ID, the alarm is based on an anomaly detection model.",
      "example": "500123"
    },
    "StateTransitionedTimestamp": {
      "type": "string",
      "format": "date-time",
      "description": "The date and time that the alarm's StateValue most recently changed.",
      "example": "2026-01-15T10:30:00Z"
    }
  }
}