Opensearch bucket monitor

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Hi,

I am new to Opensearch Alerts and I am trying to do an alert based on percentage values of doc from one method over the total methods triggered in a specific timeframe. I bulit the following query:

GET methods/_search
{
  "size": 0,
  "query": {
    "bool": {
      "filter": [
        {
          "range": {
            "timestamp": {
              "from": "now-1h",
              "to": "now",
              "include_lower": true,
              "include_upper": true,
              "format": "epoch_millis",
              "boost": 1
            }
          }
        }
      ],
      "adjust_pure_negative": true,
      "boost": 1
    }
  },
  "aggs": {
    "filters_agg": {
      "filters": {
        "filters": {
          "sourceCount": {
            "match_all": {}
          }
        }
      },
      "aggs": {
        "total_method_count": {
          "value_count": {
            "field": "id"
          }
        },
        "method_one": {
          "filter": {
            "term": {
              "method.keyword": "one"
            }
            
          },
          "aggs": {
            "total_count": {
              "value_count": {
                "field": "id"
              }
            }
          }
        },
        "method_one_percentage":
        {
          "bucket_script": {
            "buckets_path": {
              "methodOneCount": "method_one>total_count",
              "totalMethodCount": "total_method_count"
            },
            "script": "params.methodOneCount / params.totalMethodCount * 100"
          }
        }
      }
    }
  }
}

which gives the following output

{
  "took": 37,
  "timed_out": false,
  "_shards": {
    "total": 4,
    "successful": 4,
    "skipped": 3,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 331,
      "relation": "eq"
    },
    "max_score": null,
    "hits": []
  },
  "aggregations": {
    "filters_agg": {
      "buckets": {
        "sourceCount": {
          "doc_count": 331,
          "method_one": {
            "doc_count": 228,
            "total_count": {
              "value": 228
            }
          },
          "total_method_count": {
            "value": 331
          },
          "method_one_percentage": {
            "value": 68.8821752265861
          }
        }
      }
    }
  }
}

How can I use the above in the bucket triggers to trigger an alert when method_one_percentage is below 50 ?

Thanks