diff --git a/web/src/pages/agent/canvas/node/dropdown/accordion-operators.tsx b/web/src/pages/agent/canvas/node/dropdown/accordion-operators.tsx
index dd458279c..6021420c5 100644
--- a/web/src/pages/agent/canvas/node/dropdown/accordion-operators.tsx
+++ b/web/src/pages/agent/canvas/node/dropdown/accordion-operators.tsx
@@ -81,7 +81,6 @@ export function AccordionOperators({
               Operator.DataOperations,
               Operator.VariableAssigner,
               Operator.ListOperations,
-              Operator.VariableAssigner,
               Operator.VariableAggregator,
             ]}
             isCustomDropdown={isCustomDropdown}
diff --git a/web/src/pages/agent/form/components/structured-output-secondary-menu.tsx b/web/src/pages/agent/form/components/structured-output-secondary-menu.tsx
index 2e7a34390..5fcf6ed4e 100644
--- a/web/src/pages/agent/form/components/structured-output-secondary-menu.tsx
+++ b/web/src/pages/agent/form/components/structured-output-secondary-menu.tsx
@@ -4,6 +4,7 @@ import {
   HoverCardTrigger,
 } from '@/components/ui/hover-card';
 import { cn } from '@/lib/utils';
+import { getStructuredDatatype } from '@/utils/canvas-util';
 import { get, isEmpty, isPlainObject } from 'lodash';
 import { ChevronRight } from 'lucide-react';
 import { PropsWithChildren, ReactNode, useCallback } from 'react';
@@ -62,22 +63,28 @@ export function StructuredOutputSecondaryMenu({
                 value: option.value + `.${key}`,
               };
 
-              const dataType = get(value, 'type');
+              const { dataType, compositeDataType } =
+                getStructuredDatatype(value);
 
               if (
                 isEmpty(types) ||
                 (!isEmpty(types) &&
-                  (types?.some((x) => x === dataType) ||
+                  (types?.some((x) => x === compositeDataType) ||
                     hasSpecificTypeChild(value ?? {}, types)))
               ) {
                 return (
                   <li key={key} className="pl-1">
                     <div
-                      onClick={handleSubMenuClick(nextOption, dataType)}
+                      onClick={handleSubMenuClick(
+                        nextOption,
+                        compositeDataType,
+                      )}
                       className="hover:bg-bg-card p-1 text-text-primary rounded-sm flex justify-between"
                     >
                       {key}
-                      <span className="text-text-secondary">{dataType}</span>
+                      <span className="text-text-secondary">
+                        {compositeDataType}
+                      </span>
                     </div>
                     {[JsonSchemaDataType.Object, JsonSchemaDataType.Array].some(
                       (x) => x === dataType,
@@ -122,7 +129,7 @@ export function StructuredOutputSecondaryMenu({
         side="left"
         align="start"
         className={cn(
-          'min-w-[140px]  border border-border rounded-md shadow-lg p-0',
+          'min-w-72  border border-border rounded-md shadow-lg p-0',
         )}
       >
         <section className="p-2">
diff --git a/web/src/pages/agent/form/message-form/index.tsx b/web/src/pages/agent/form/message-form/index.tsx
index 31b52659e..177fc2f45 100644
--- a/web/src/pages/agent/form/message-form/index.tsx
+++ b/web/src/pages/agent/form/message-form/index.tsx
@@ -81,7 +81,8 @@ function MessageForm({ node }: INextOperatorForm) {
                       )}
                       {...field}
                       onValueChange={field.onChange}
-                      placeholder={t('flow.messagePlaceholder')}
+                      placeholder={t('common.selectPlaceholder')}
+                      allowClear
                     ></RAGFlowSelect>
                   </FormControl>
                 </FormItem>
diff --git a/web/src/pages/agent/form/message-form/use-values.ts b/web/src/pages/agent/form/message-form/use-values.ts
index 0cece91fc..6a90881be 100644
--- a/web/src/pages/agent/form/message-form/use-values.ts
+++ b/web/src/pages/agent/form/message-form/use-values.ts
@@ -1,7 +1,7 @@
 import { RAGFlowNodeType } from '@/interfaces/database/flow';
 import { isEmpty } from 'lodash';
 import { useMemo } from 'react';
-import { ExportFileType, initialMessageValues } from '../../constant';
+import { initialMessageValues } from '../../constant';
 import { convertToObjectArray } from '../../utils';
 
 export function useValues(node?: RAGFlowNodeType) {
@@ -15,7 +15,6 @@ export function useValues(node?: RAGFlowNodeType) {
     return {
       ...formData,
       content: convertToObjectArray(formData.content),
-      output_format: formData.output_format || ExportFileType.PDF,
     };
   }, [node]);
 
diff --git a/web/src/pages/agent/hooks/use-build-structured-output.ts b/web/src/pages/agent/hooks/use-build-structured-output.ts
index 891c2dfa9..c9d34bd43 100644
--- a/web/src/pages/agent/hooks/use-build-structured-output.ts
+++ b/web/src/pages/agent/hooks/use-build-structured-output.ts
@@ -1,3 +1,4 @@
+import { getStructuredDatatype } from '@/utils/canvas-util';
 import { get, isPlainObject } from 'lodash';
 import { ReactNode, useCallback } from 'react';
 import {
@@ -106,10 +107,10 @@ export function useFindAgentStructuredOutputTypeByValue() {
       if (isPlainObject(values) && properties) {
         for (const [key, value] of Object.entries(properties)) {
           const nextPath = path ? `${path}.${key}` : key;
-          const dataType = get(value, 'type');
+          const { dataType, compositeDataType } = getStructuredDatatype(value);
 
           if (nextPath === target) {
-            return dataType;
+            return compositeDataType;
           }
 
           if (
diff --git a/web/src/pages/agent/utils/filter-agent-structured-output.ts b/web/src/pages/agent/utils/filter-agent-structured-output.ts
index 40db6b4fe..c20263631 100644
--- a/web/src/pages/agent/utils/filter-agent-structured-output.ts
+++ b/web/src/pages/agent/utils/filter-agent-structured-output.ts
@@ -1,9 +1,13 @@
 import { JSONSchema } from '@/components/jsonjoy-builder';
+import { getStructuredDatatype } from '@/utils/canvas-util';
 import { get, isPlainObject, toLower } from 'lodash';
 import { JsonSchemaDataType } from '../constant';
 
-function predicate(types: string[], type: string) {
-  return types.some((x) => toLower(x) === toLower(type));
+function predicate(types: string[], value: unknown) {
+  return types.some(
+    (x) =>
+      toLower(x) === toLower(getStructuredDatatype(value).compositeDataType),
+  );
 }
 
 export function hasSpecificTypeChild(
@@ -12,7 +16,7 @@ export function hasSpecificTypeChild(
 ) {
   if (Array.isArray(data)) {
     for (const value of data) {
-      if (isPlainObject(value) && predicate(types, value.type)) {
+      if (isPlainObject(value) && predicate(types, value)) {
         return true;
       }
       if (hasSpecificTypeChild(value, types)) {
@@ -23,7 +27,11 @@ export function hasSpecificTypeChild(
 
   if (isPlainObject(data)) {
     for (const value of Object.values(data)) {
-      if (isPlainObject(value) && predicate(types, value.type)) {
+      if (
+        isPlainObject(value) &&
+        predicate(types, value) &&
+        get(data, 'type') !== JsonSchemaDataType.Array
+      ) {
         return true;
       }
 
diff --git a/web/src/utils/canvas-util.tsx b/web/src/utils/canvas-util.tsx
index f59c4c195..d55862d3e 100644
--- a/web/src/utils/canvas-util.tsx
+++ b/web/src/utils/canvas-util.tsx
@@ -6,7 +6,7 @@ import {
 import { BaseNode } from '@/interfaces/database/agent';
 
 import { Edge } from '@xyflow/react';
-import { isEmpty } from 'lodash';
+import { get, isEmpty } from 'lodash';
 import { ComponentType, ReactNode } from 'react';
 
 export function filterAllUpstreamNodeIds(edges: Edge[], nodeIds: string[]) {
@@ -87,3 +87,15 @@ export function buildNodeOutputOptions({
       ),
     }));
 }
+
+export function getStructuredDatatype(value: Record<string, any> | unknown) {
+  const dataType = get(value, 'type');
+  const arrayItemsType = get(value, 'items.type', JsonSchemaDataType.String);
+
+  const compositeDataType =
+    dataType === JsonSchemaDataType.Array
+      ? `${dataType}<${arrayItemsType}>`
+      : dataType;
+
+  return { dataType, compositeDataType };
+}