diff --git a/apps/application/chat_pipeline/step/chat_step/impl/base_chat_step.py b/apps/application/chat_pipeline/step/chat_step/impl/base_chat_step.py
index 8511d3ce5..3dfbb6834 100644
--- a/apps/application/chat_pipeline/step/chat_step/impl/base_chat_step.py
+++ b/apps/application/chat_pipeline/step/chat_step/impl/base_chat_step.py
@@ -26,6 +26,7 @@ from application.chat_pipeline.pipeline_manage import PipelineManage
 from application.chat_pipeline.step.chat_step.i_chat_step import IChatStep, PostResponseHandler
 from application.flow.tools import Reasoning, mcp_response_generator
 from application.models import ApplicationChatUserStats, ChatUserType, Application, ApplicationApiKey
+from common.exception.app_exception import AppApiException
 from common.utils.logger import maxkb_logger
 from common.utils.rsa_util import rsa_long_decrypt
 from common.utils.tool_code import ToolExecutor
@@ -273,7 +274,10 @@ class BaseChatStep(IChatStep):
                     if app_key is not None:
                         api_key = app_key.secret_key
                     else:
-                        continue
+                        raise AppApiException(
+                            500,
+                            _('Application Key is required for application tool 【{name}】').format(name=app.name)
+                        )
                     executor = ToolExecutor()
                     app_config = executor.get_app_mcp_config(api_key)
                     mcp_servers_config[app.name] = app_config
diff --git a/apps/application/flow/step_node/ai_chat_step_node/impl/base_chat_node.py b/apps/application/flow/step_node/ai_chat_step_node/impl/base_chat_node.py
index ed7336625..980cdf648 100644
--- a/apps/application/flow/step_node/ai_chat_step_node/impl/base_chat_node.py
+++ b/apps/application/flow/step_node/ai_chat_step_node/impl/base_chat_node.py
@@ -13,6 +13,7 @@ from functools import reduce
 from typing import List, Dict
 
 from django.db.models import QuerySet
+from django.utils.translation import gettext as _
 from langchain.schema import HumanMessage, SystemMessage
 from langchain_core.messages import BaseMessage, AIMessage
 
@@ -20,6 +21,7 @@ from application.flow.i_step_node import NodeResult, INode
 from application.flow.step_node.ai_chat_step_node.i_chat_node import IChatNode
 from application.flow.tools import Reasoning, mcp_response_generator
 from application.models import Application, ApplicationApiKey
+from common.exception.app_exception import AppApiException
 from common.utils.rsa_util import rsa_long_decrypt
 from common.utils.tool_code import ToolExecutor
 from models_provider.models import Model
@@ -259,7 +261,10 @@ class BaseChatNode(IChatNode):
                     if app_key is not None:
                         api_key = app_key.secret_key
                     else:
-                        continue
+                        raise AppApiException(
+                            500,
+                            _('Application Key is required for application tool 【{name}】').format(name=app.name)
+                        )
                     executor = ToolExecutor()
                     app_config = executor.get_app_mcp_config(api_key)
                     mcp_servers_config[app.name] = app_config