diff --git a/packages/cli/src/config/settings.test.ts b/packages/cli/src/config/settings.test.ts
index 2234c9ea45..9550932c9f 100644
--- a/packages/cli/src/config/settings.test.ts
+++ b/packages/cli/src/config/settings.test.ts
@@ -348,7 +348,7 @@ describe('Settings Loading and Merging', () => {
           fileName: 'WORKSPACE_CONTEXT.md',
         },
         mcp: {
-          allowed: ['server1', 'server2'],
+          allowed: ['server1', 'server2', 'server3', 'server1', 'server2'],
         },
       });
     });
@@ -1474,8 +1474,8 @@ describe('Settings Loading and Merging', () => {
       const settings = loadSettings(MOCK_WORKSPACE_DIR);
 
       expect(settings.merged.mcp).toEqual({
-        allowed: ['system-allowed'],
-        excluded: ['workspace-excluded'],
+        allowed: ['user-allowed', 'workspace-allowed', 'system-allowed'],
+        excluded: ['user-excluded', 'workspace-excluded'],
       });
     });
 
diff --git a/packages/cli/src/config/settingsSchema.ts b/packages/cli/src/config/settingsSchema.ts
index b2d24712b6..4701abc1ab 100644
--- a/packages/cli/src/config/settingsSchema.ts
+++ b/packages/cli/src/config/settingsSchema.ts
@@ -998,6 +998,7 @@ const SETTINGS_SCHEMA = {
         default: undefined as string[] | undefined,
         description: 'A list of MCP servers to allow.',
         showInDialog: false,
+        mergeStrategy: MergeStrategy.CONCAT,
       },
       excluded: {
         type: 'array',
@@ -1007,6 +1008,7 @@ const SETTINGS_SCHEMA = {
         default: undefined as string[] | undefined,
         description: 'A list of MCP servers to exclude.',
         showInDialog: false,
+        mergeStrategy: MergeStrategy.CONCAT,
       },
     },
   },
diff --git a/packages/cli/src/ui/components/mcp/MCPManagementDialog.tsx b/packages/cli/src/ui/components/mcp/MCPManagementDialog.tsx
index b9881932df..ce84814a7a 100644
--- a/packages/cli/src/ui/components/mcp/MCPManagementDialog.tsx
+++ b/packages/cli/src/ui/components/mcp/MCPManagementDialog.tsx
@@ -95,16 +95,10 @@ export const MCPManagementDialog: React.FC<MCPManagementDialogProps> = ({
       let source: 'user' | 'project' | 'extension' = 'user';
       if (serverConfig.extensionName) {
         source = 'extension';
-      }
-
-      // Determine the scope of the configuration
-      let scope: 'user' | 'workspace' | 'extension' = 'user';
-      if (serverConfig.extensionName) {
-        scope = 'extension';
       } else if (workspaceSettings.mcpServers?.[name]) {
-        scope = 'workspace';
+        source = 'project';
       } else if (userSettings.mcpServers?.[name]) {
-        scope = 'user';
+        source = 'user';
       }
 
       // Use config.isMcpServerDisabled() to check if server is disabled
@@ -119,7 +113,6 @@ export const MCPManagementDialog: React.FC<MCPManagementDialogProps> = ({
         name,
         status,
         source,
-        scope,
         config: serverConfig,
         toolCount: serverTools.length,
         invalidToolCount,
@@ -343,7 +336,7 @@ export const MCPManagementDialog: React.FC<MCPManagementDialogProps> = ({
 
         // Determine the scope based on server configuration location
         let targetScope: 'user' | 'workspace' = 'user';
-        if (server.scope === 'extension') {
+        if (server.source === 'extension') {
           // Extension servers should not be disabled through user/workspace settings
           // Show error message and return
           debugLogger.warn(
@@ -351,7 +344,7 @@ export const MCPManagementDialog: React.FC<MCPManagementDialogProps> = ({
           );
           setIsLoading(false);
           return;
-        } else if (server.scope === 'workspace') {
+        } else if (server.source === 'project') {
           targetScope = 'workspace';
         }
 
diff --git a/packages/cli/src/ui/components/mcp/steps/ServerDetailStep.tsx b/packages/cli/src/ui/components/mcp/steps/ServerDetailStep.tsx
index d23dccf871..a4463476fb 100644
--- a/packages/cli/src/ui/components/mcp/steps/ServerDetailStep.tsx
+++ b/packages/cli/src/ui/components/mcp/steps/ServerDetailStep.tsx
@@ -136,9 +136,9 @@ export const ServerDetailStep: React.FC<ServerDetailStepProps> = ({
           </Box>
           <Box>
             <Text color={theme.text.primary}>
-              {server.scope === 'user'
+              {server.source === 'user'
                 ? t('User Settings')
-                : server.scope === 'workspace'
+                : server.source === 'project'
                   ? t('Workspace Settings')
                   : t('Extension')}
             </Text>
diff --git a/packages/cli/src/ui/components/mcp/types.ts b/packages/cli/src/ui/components/mcp/types.ts
index 34374fa23b..8812c5f12c 100644
--- a/packages/cli/src/ui/components/mcp/types.ts
+++ b/packages/cli/src/ui/components/mcp/types.ts
@@ -34,8 +34,6 @@ export interface MCPServerDisplayInfo {
   status: MCPServerStatus;
   /** 来源类型 */
   source: 'user' | 'project' | 'extension';
-  /** 配置所在的 scope */
-  scope: 'user' | 'workspace' | 'extension';
   /** 配置文件路径 */
   configPath?: string;
   /** 服务器配置 */
diff --git a/packages/cli/src/ui/components/mcp/utils.test.ts b/packages/cli/src/ui/components/mcp/utils.test.ts
index 3b058ba554..155195454f 100644
--- a/packages/cli/src/ui/components/mcp/utils.test.ts
+++ b/packages/cli/src/ui/components/mcp/utils.test.ts
@@ -25,7 +25,6 @@ describe('MCP utils', () => {
           name: 'server1',
           status: MCPServerStatus.CONNECTED,
           source: 'user',
-          scope: 'user',
           config: { command: 'cmd1' },
           toolCount: 1,
           promptCount: 0,
@@ -35,7 +34,6 @@ describe('MCP utils', () => {
           name: 'server2',
           status: MCPServerStatus.CONNECTED,
           source: 'extension',
-          scope: 'extension',
           config: { command: 'cmd2' },
           toolCount: 2,
           promptCount: 0,