diff --git a/alerting/src/main/kotlin/org/opensearch/alerting/resthandler/RestSearchMonitorAction.kt b/alerting/src/main/kotlin/org/opensearch/alerting/resthandler/RestSearchMonitorAction.kt
index 895e3c565..b831ee4c5 100644
--- a/alerting/src/main/kotlin/org/opensearch/alerting/resthandler/RestSearchMonitorAction.kt
+++ b/alerting/src/main/kotlin/org/opensearch/alerting/resthandler/RestSearchMonitorAction.kt
@@ -97,14 +97,6 @@ class RestSearchMonitorAction(
         searchSourceBuilder.parseXContent(request.contentOrSourceParamParser())
         searchSourceBuilder.fetchSource(context(request))
 
-        val queryBuilder = QueryBuilders.boolQuery().must(searchSourceBuilder.query())
-        if (index == SCHEDULED_JOBS_INDEX) {
-            queryBuilder.filter(QueryBuilders.existsQuery(Monitor.MONITOR_TYPE))
-        }
-
-        searchSourceBuilder.query(queryBuilder)
-            .seqNoAndPrimaryTerm(true)
-            .version(true)
         val searchRequest = SearchRequest()
             .source(searchSourceBuilder)
             .indices(index)
diff --git a/alerting/src/main/kotlin/org/opensearch/alerting/transport/TransportSearchMonitorAction.kt b/alerting/src/main/kotlin/org/opensearch/alerting/transport/TransportSearchMonitorAction.kt
index 610fdaf99..82a830fe7 100644
--- a/alerting/src/main/kotlin/org/opensearch/alerting/transport/TransportSearchMonitorAction.kt
+++ b/alerting/src/main/kotlin/org/opensearch/alerting/transport/TransportSearchMonitorAction.kt
@@ -23,6 +23,7 @@ import org.opensearch.cluster.service.ClusterService
 import org.opensearch.common.inject.Inject
 import org.opensearch.common.settings.Settings
 import org.opensearch.commons.alerting.model.Monitor
+import org.opensearch.commons.alerting.model.ScheduledJob
 import org.opensearch.commons.authuser.User
 import org.opensearch.index.query.BoolQueryBuilder
 import org.opensearch.index.query.ExistsQueryBuilder
@@ -51,12 +52,14 @@ class TransportSearchMonitorAction @Inject constructor(
 
     override fun doExecute(task: Task, searchMonitorRequest: SearchMonitorRequest, actionListener: ActionListener<SearchResponse>) {
         val searchSourceBuilder = searchMonitorRequest.searchRequest.source()
-        val queryBuilder = if (searchSourceBuilder.query() == null) BoolQueryBuilder()
-        else QueryBuilders.boolQuery().must(searchSourceBuilder.query())
+            .seqNoAndPrimaryTerm(true)
+            .version(true)
+        val queryBuilder = QueryBuilders.boolQuery().must(searchSourceBuilder.query())
 
-        if (searchMonitorRequest.searchRequest.indices().size == 1 &&
-            !searchMonitorRequest.searchRequest.indices().contains(ALL_ALERT_INDEX_PATTERN)
-        ) {
+        // The SearchMonitor API supports one 'index' parameter of either the SCHEDULED_JOBS_INDEX or ALL_ALERT_INDEX_PATTERN.
+        // When querying the ALL_ALERT_INDEX_PATTERN, we don't want to check whether the MONITOR_TYPE field exists
+        // because we're querying alert indexes.
+        if (searchMonitorRequest.searchRequest.indices().contains(ScheduledJob.SCHEDULED_JOBS_INDEX)) {
             queryBuilder.filter(QueryBuilders.existsQuery(Monitor.MONITOR_TYPE))
         }