diff --git a/public/components/event_analytics/explorer/query_assist/input.tsx b/public/components/event_analytics/explorer/query_assist/input.tsx
index e6b18df58..a079cbfea 100644
--- a/public/components/event_analytics/explorer/query_assist/input.tsx
+++ b/public/components/event_analytics/explorer/query_assist/input.tsx
@@ -5,7 +5,6 @@
 
 import {
   EuiButton,
-  EuiButtonIcon,
   EuiCallOut,
   EuiComboBoxOptionOption,
   EuiFieldText,
@@ -96,6 +95,7 @@ const prohibitedQueryCallOut = (
     size="s"
     color="danger"
     iconType="alert"
+    dismissible
   />
 );
 
@@ -106,6 +106,18 @@ const emptyQueryCallOut = (
     size="s"
     color="warning"
     iconType="iInCircle"
+    dismissible
+  />
+);
+
+const pplGenerated = (
+  <EuiCallOut
+    data-test-subj="query-assist-ppl-callout"
+    title="PPL query generated"
+    size="s"
+    color="success"
+    iconType="check"
+    dismissible
   />
 );
 
@@ -176,6 +188,7 @@ export const QueryAssistInput: React.FC<React.PropsWithChildren<Props>> = (props
         },
       })
     );
+    setCallOut(pplGenerated);
     return generatedPPL;
   };
   const formatError = (error: ResponseError | Error): Error => {
@@ -366,16 +379,6 @@ export const QueryAssistInput: React.FC<React.PropsWithChildren<Props>> = (props
             </EuiListGroup>
           </EuiInputPopover>
         </EuiFlexItem>
-        <EuiFlexItem grow={false}>
-          <EuiButtonIcon
-            iconType="returnKey"
-            display={props.lastFocusedInput === 'nlq_input' ? 'fill' : 'base'}
-            isDisabled={loading}
-            onClick={runAndSummarize}
-            size="m"
-            aria-label="submit-question"
-          />
-        </EuiFlexItem>
       </EuiFlexGroup>
       {callOut}
       {props.children && <EuiSpacer size="s" />}
diff --git a/server/routes/dsl.ts b/server/routes/dsl.ts
index 580a55152..9bdc45342 100644
--- a/server/routes/dsl.ts
+++ b/server/routes/dsl.ts
@@ -52,7 +52,7 @@ export function registerDslRoute({ router }: { router: IRouter; facet: DSLFacet
       validate: {
         query: schema.object({
           format: schema.string(),
-          index: schema.string(),
+          index: schema.maybe(schema.string()),
         }),
       },
     },