diff --git a/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/anomaly_threshold_slider/index.tsx b/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/anomaly_threshold_slider/index.tsx
index 18970ff935b8d..1e18023e0c326 100644
--- a/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/anomaly_threshold_slider/index.tsx
+++ b/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/anomaly_threshold_slider/index.tsx
@@ -10,12 +10,16 @@ import { EuiFlexGrid, EuiFlexItem, EuiRange, EuiFormRow } from '@elastic/eui';
 import { FieldHook } from '../../../../../shared_imports';
 
 interface AnomalyThresholdSliderProps {
+  describedByIds: string[];
   field: FieldHook;
 }
 type Event = React.ChangeEvent<HTMLInputElement>;
 type EventArg = Event | React.MouseEvent<HTMLButtonElement>;
 
-export const AnomalyThresholdSlider: React.FC<AnomalyThresholdSliderProps> = ({ field }) => {
+export const AnomalyThresholdSlider: React.FC<AnomalyThresholdSliderProps> = ({
+  describedByIds = [],
+  field,
+}) => {
   const threshold = field.value as number;
   const onThresholdChange = useCallback(
     (event: EventArg) => {
@@ -26,7 +30,12 @@ export const AnomalyThresholdSlider: React.FC<AnomalyThresholdSliderProps> = ({
   );
 
   return (
-    <EuiFormRow label={field.label} fullWidth>
+    <EuiFormRow
+      fullWidth
+      label={field.label}
+      data-test-subj="anomalyThresholdSlider"
+      describedByIds={describedByIds}
+    >
       <EuiFlexGrid columns={2}>
         <EuiFlexItem>
           <EuiRange
diff --git a/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/ml_job_select/index.tsx b/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/ml_job_select/index.tsx
index 627fa21cc2f61..bc32162c2660b 100644
--- a/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/ml_job_select/index.tsx
+++ b/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/ml_job_select/index.tsx
@@ -20,10 +20,11 @@ const JobDisplay = ({ title, description }: { title: string; description: string
 );
 
 interface MlJobSelectProps {
+  describedByIds: string[];
   field: FieldHook;
 }
 
-export const MlJobSelect: React.FC<MlJobSelectProps> = ({ field }) => {
+export const MlJobSelect: React.FC<MlJobSelectProps> = ({ describedByIds = [], field }) => {
   const jobId = field.value as string;
   const { isInvalid, errorMessage } = getFieldValidityAndErrorMessage(field);
   const [isLoading, siemJobs] = useSiemJobs(false);
@@ -41,7 +42,14 @@ export const MlJobSelect: React.FC<MlJobSelectProps> = ({ field }) => {
   }));
 
   return (
-    <EuiFormRow fullWidth label={field.label} isInvalid={isInvalid} error={errorMessage}>
+    <EuiFormRow
+      fullWidth
+      label={field.label}
+      isInvalid={isInvalid}
+      error={errorMessage}
+      data-test-subj="mlJobSelect"
+      describedByIds={describedByIds}
+    >
       <EuiFlexGroup>
         <EuiFlexItem>
           <EuiSuperSelect
diff --git a/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/select_rule_type/index.tsx b/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/select_rule_type/index.tsx
index 229ccde54ecab..219b3d6dc4d58 100644
--- a/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/select_rule_type/index.tsx
+++ b/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/select_rule_type/index.tsx
@@ -5,19 +5,58 @@
  */
 
 import React, { useCallback } from 'react';
-import { EuiCard, EuiFlexGrid, EuiFlexItem, EuiIcon, EuiFormRow } from '@elastic/eui';
+import { FormattedMessage } from '@kbn/i18n/react';
+import {
+  EuiCard,
+  EuiFlexGrid,
+  EuiFlexItem,
+  EuiFormRow,
+  EuiIcon,
+  EuiLink,
+  EuiText,
+} from '@elastic/eui';
 
 import { FieldHook } from '../../../../../shared_imports';
 import { RuleType } from '../../../../../containers/detection_engine/rules/types';
 import * as i18n from './translations';
 import { isMlRule } from '../../helpers';
 
+const MlCardDescription = ({ hasValidLicense = false }: { hasValidLicense?: boolean }) => (
+  <EuiText size="s">
+    {hasValidLicense ? (
+      i18n.ML_TYPE_DESCRIPTION
+    ) : (
+      <FormattedMessage
+        id="xpack.siem.detectionEngine.createRule.stepDefineRule.ruleTypeField.mlTypeDisabledDescription"
+        defaultMessage="Access to ML requires a {subscriptionsLink}."
+        values={{
+          subscriptionsLink: (
+            <EuiLink href="https://www.elastic.co/subscriptions" target="_blank">
+              <FormattedMessage
+                id="xpack.siem.components.stepDefineRule.ruleTypeField.subscriptionsLink"
+                defaultMessage="Platinum subscription"
+              />
+            </EuiLink>
+          ),
+        }}
+      />
+    )}
+  </EuiText>
+);
+
 interface SelectRuleTypeProps {
+  describedByIds?: string[];
   field: FieldHook;
-  isReadOnly: boolean;
+  hasValidLicense?: boolean;
+  isReadOnly?: boolean;
 }
 
-export const SelectRuleType: React.FC<SelectRuleTypeProps> = ({ field, isReadOnly = false }) => {
+export const SelectRuleType: React.FC<SelectRuleTypeProps> = ({
+  describedByIds = [],
+  field,
+  hasValidLicense = false,
+  isReadOnly = false,
+}) => {
   const ruleType = field.value as RuleType;
   const setType = useCallback(
     (type: RuleType) => {
@@ -27,10 +66,15 @@ export const SelectRuleType: React.FC<SelectRuleTypeProps> = ({ field, isReadOnl
   );
   const setMl = useCallback(() => setType('machine_learning'), [setType]);
   const setQuery = useCallback(() => setType('query'), [setType]);
-  const license = true; // TODO
+  const mlCardDisabled = isReadOnly || !hasValidLicense;
 
   return (
-    <EuiFormRow label={field.label} fullWidth>
+    <EuiFormRow
+      fullWidth
+      data-test-subj="selectRuleType"
+      describedByIds={describedByIds}
+      label={field.label}
+    >
       <EuiFlexGrid columns={4}>
         <EuiFlexItem>
           <EuiCard
@@ -47,11 +91,11 @@ export const SelectRuleType: React.FC<SelectRuleTypeProps> = ({ field, isReadOnl
         <EuiFlexItem>
           <EuiCard
             title={i18n.ML_TYPE_TITLE}
-            description={license ? i18n.ML_TYPE_DESCRIPTION : i18n.ML_TYPE_DISABLED_DESCRIPTION}
-            isDisabled={!license}
+            description={<MlCardDescription hasValidLicense={hasValidLicense} />}
             icon={<EuiIcon size="l" type="machineLearningApp" />}
+            isDisabled={mlCardDisabled}
             selectable={{
-              isDisabled: isReadOnly,
+              isDisabled: mlCardDisabled,
               onClick: setMl,
               isSelected: isMlRule(ruleType),
             }}
diff --git a/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/select_rule_type/translations.ts b/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/select_rule_type/translations.ts
index 32b860e8f703e..4dc0a89af4a49 100644
--- a/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/select_rule_type/translations.ts
+++ b/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/select_rule_type/translations.ts
@@ -33,10 +33,3 @@ export const ML_TYPE_DESCRIPTION = i18n.translate(
     defaultMessage: 'Select ML job to detect anomalous activity.',
   }
 );
-
-export const ML_TYPE_DISABLED_DESCRIPTION = i18n.translate(
-  'xpack.siem.detectionEngine.createRule.stepDefineRule.ruleTypeField.mlTypeDisabledDescription',
-  {
-    defaultMessage: 'Access to ML requires a Platinum subscription.',
-  }
-);
diff --git a/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/step_define_rule/index.tsx b/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/step_define_rule/index.tsx
index d3ef185f3786b..cf8cc4b87b388 100644
--- a/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/step_define_rule/index.tsx
+++ b/x-pack/legacy/plugins/siem/public/pages/detection_engine/rules/components/step_define_rule/index.tsx
@@ -13,13 +13,14 @@ import {
   EuiButton,
 } from '@elastic/eui';
 import { isEmpty } from 'lodash/fp';
-import React, { FC, memo, useCallback, useState, useEffect } from 'react';
+import React, { FC, memo, useCallback, useState, useEffect, useContext } from 'react';
 import styled from 'styled-components';
 import deepEqual from 'fast-deep-equal';
 
 import { IIndexPattern } from '../../../../../../../../../../src/plugins/data/public';
 import { useFetchIndexPatterns } from '../../../../../containers/detection_engine/rules';
 import { DEFAULT_INDEX_KEY } from '../../../../../../common/constants';
+import { MlCapabilitiesContext } from '../../../../../components/ml/permissions/ml_capabilities_provider';
 import { useUiSetting$ } from '../../../../../lib/kibana';
 import { setFieldValue, isMlRule } from '../../helpers';
 import * as RuleI18n from '../../translations';
@@ -103,6 +104,7 @@ const StepDefineRuleComponent: FC<StepDefineRuleProps> = ({
   setForm,
   setStepData,
 }) => {
+  const mlCapabilities = useContext(MlCapabilitiesContext);
   const [openTimelineSearch, setOpenTimelineSearch] = useState(false);
   const [localUseIndicesConfig, setLocalUseIndicesConfig] = useState(false);
   const [localIsMlRule, setIsMlRule] = useState(false);
@@ -182,6 +184,8 @@ const StepDefineRuleComponent: FC<StepDefineRuleProps> = ({
             path="ruleType"
             component={SelectRuleType}
             componentProps={{
+              describedByIds: ['detectionEngineStepDefineRuleType'],
+              hasValidLicense: mlCapabilities.isPlatinumOrTrialLicense,
               isReadOnly: isUpdateView,
             }}
           />
@@ -220,7 +224,6 @@ const StepDefineRuleComponent: FC<StepDefineRuleProps> = ({
                 component={QueryBarDefineRule}
                 componentProps={{
                   browserFields,
-                  loading: indexPatternLoadingQueryBar,
                   idAria: 'detectionEngineStepDefineRuleQueryBar',
                   indexPattern: indexPatternQueryBar,
                   isDisabled: isLoading,
@@ -234,8 +237,20 @@ const StepDefineRuleComponent: FC<StepDefineRuleProps> = ({
           </EuiFormRow>
           <EuiFormRow fullWidth style={{ display: localIsMlRule ? 'flex' : 'none' }}>
             <>
-              <UseField path="machineLearningJobId" component={MlJobSelect} />
-              <UseField path="anomalyThreshold" component={AnomalyThresholdSlider} />
+              <UseField
+                path="machineLearningJobId"
+                component={MlJobSelect}
+                componentProps={{
+                  describedByIds: ['detectionEngineStepDefineRulemachineLearningJobId'],
+                }}
+              />
+              <UseField
+                path="anomalyThreshold"
+                component={AnomalyThresholdSlider}
+                componentProps={{
+                  describedByIds: ['detectionEngineStepDefineRuleAnomalyThreshold'],
+                }}
+              />
             </>
           </EuiFormRow>
           <FormDataProvider pathsToWatch={['index', 'ruleType']}>