diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9040109da..5e5df346d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## [Unreleased]
+
+### Fixed
+
+- Fixed `xcode_tools_bridge_disconnect` immediately re-syncing proxied tools after a manual disconnect ([#343](https://github.com/getsentry/XcodeBuildMCP/issues/343)).
+
 ## [2.3.2]
 
 ### Fixed
@@ -426,5 +432,3 @@ Please note that the UI automation features are an early preview and currently i
 ## [v1.0.1] - 2025-04-02
 - Initial release of XcodeBuildMCP
 - Basic support for building iOS and macOS applications
-
-
diff --git a/src/integrations/xcode-tools-bridge/__tests__/manager.test.ts b/src/integrations/xcode-tools-bridge/__tests__/manager.test.ts
new file mode 100644
index 000000000..29691fcdb
--- /dev/null
+++ b/src/integrations/xcode-tools-bridge/__tests__/manager.test.ts
@@ -0,0 +1,108 @@
+import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+const { registryMocks, buildStatusMock, serviceMocks, onToolCatalogInvalidatedRef } = vi.hoisted(
+  () => ({
+    registryMocks: {
+      clear: vi.fn(),
+      getRegisteredCount: vi.fn(() => 0),
+      sync: vi.fn(() => ({ added: 0, updated: 0, removed: 0, total: 0 })),
+    },
+    buildStatusMock: vi.fn(),
+    serviceMocks: {
+      setWorkflowEnabled: vi.fn(),
+      disconnect: vi.fn(),
+      getClientStatus: vi.fn(),
+      getLastError: vi.fn(),
+      listTools: vi.fn(),
+      invokeTool: vi.fn(),
+    },
+    onToolCatalogInvalidatedRef: {
+      current: undefined as (() => void) | undefined,
+    },
+  }),
+);
+
+vi.mock('../registry.ts', () => ({
+  XcodeToolsProxyRegistry: vi.fn().mockImplementation(() => registryMocks),
+}));
+
+vi.mock('../core.ts', () => ({
+  buildXcodeToolsBridgeStatus: buildStatusMock,
+  classifyBridgeError: vi.fn(() => 'XCODE_MCP_UNAVAILABLE'),
+  getMcpBridgeAvailability: vi.fn(),
+  serializeBridgeTool: vi.fn((tool) => tool),
+}));
+
+vi.mock('../tool-service.ts', () => ({
+  XcodeIdeToolService: vi
+    .fn()
+    .mockImplementation((options: { onToolCatalogInvalidated?: () => void }) => {
+      onToolCatalogInvalidatedRef.current = options.onToolCatalogInvalidated;
+      return serviceMocks;
+    }),
+}));
+
+import { XcodeToolsBridgeManager } from '../manager.ts';
+
+describe('XcodeToolsBridgeManager', () => {
+  beforeEach(() => {
+    onToolCatalogInvalidatedRef.current = undefined;
+
+    registryMocks.clear.mockReset();
+    registryMocks.getRegisteredCount.mockReset();
+    registryMocks.getRegisteredCount.mockReturnValue(0);
+    registryMocks.sync.mockReset();
+    registryMocks.sync.mockReturnValue({ added: 0, updated: 0, removed: 0, total: 0 });
+
+    buildStatusMock.mockReset();
+    buildStatusMock.mockResolvedValue({
+      workflowEnabled: true,
+      bridgeAvailable: false,
+      bridgePath: null,
+      xcodeRunning: null,
+      connected: false,
+      bridgePid: null,
+      proxiedToolCount: 0,
+      lastError: null,
+      xcodePid: null,
+      xcodeSessionId: null,
+    });
+
+    serviceMocks.setWorkflowEnabled.mockReset();
+    serviceMocks.disconnect.mockReset();
+    serviceMocks.disconnect.mockImplementation(async () => {
+      onToolCatalogInvalidatedRef.current?.();
+    });
+    serviceMocks.getClientStatus.mockReset();
+    serviceMocks.getClientStatus.mockReturnValue({
+      connected: false,
+      bridgePid: null,
+      lastError: null,
+    });
+    serviceMocks.getLastError.mockReset();
+    serviceMocks.getLastError.mockReturnValue(null);
+    serviceMocks.listTools.mockReset();
+    serviceMocks.invokeTool.mockReset();
+  });
+
+  it('does not resync on listChanged while a manual disconnect is in progress', async () => {
+    const server = {
+      sendToolListChanged: vi.fn(),
+    } as unknown as McpServer;
+
+    const manager = new XcodeToolsBridgeManager(server);
+    manager.setWorkflowEnabled(true);
+
+    const syncSpy = vi.spyOn(manager, 'syncTools');
+
+    await manager.disconnectTool();
+    await Promise.resolve();
+    await new Promise((resolve) => setTimeout(resolve, 0));
+
+    expect(serviceMocks.disconnect).toHaveBeenCalledOnce();
+    expect(syncSpy).not.toHaveBeenCalled();
+    expect(registryMocks.clear).toHaveBeenCalledOnce();
+    expect(server.sendToolListChanged).toHaveBeenCalledOnce();
+  });
+});
diff --git a/src/integrations/xcode-tools-bridge/manager.ts b/src/integrations/xcode-tools-bridge/manager.ts
index bf59a424a..9b0e60146 100644
--- a/src/integrations/xcode-tools-bridge/manager.ts
+++ b/src/integrations/xcode-tools-bridge/manager.ts
@@ -20,12 +20,16 @@ export class XcodeToolsBridgeManager {
   private workflowEnabled = false;
   private lastError: string | null = null;
   private syncInFlight: Promise<ProxySyncResult> | null = null;
+  private suppressListChangedSync = false;
 
   constructor(server: McpServer) {
     this.server = server;
     this.registry = new XcodeToolsProxyRegistry(server);
     this.service = new XcodeIdeToolService({
       onToolCatalogInvalidated: (): void => {
+        if (this.suppressListChangedSync) {
+          return;
+        }
         void this.syncTools({ reason: 'listChanged' });
       },
     });
@@ -57,6 +61,10 @@ export class XcodeToolsBridgeManager {
       throw new Error('xcode-ide workflow is not enabled');
     }
 
+    if (opts.reason !== 'listChanged') {
+      this.suppressListChangedSync = false;
+    }
+
     if (this.syncInFlight) return this.syncInFlight;
 
     this.syncInFlight = (async (): Promise<ProxySyncResult> => {
@@ -103,6 +111,7 @@ export class XcodeToolsBridgeManager {
   }
 
   async disconnect(): Promise<void> {
+    this.suppressListChangedSync = true;
     this.registry.clear();
     this.server.sendToolListChanged();
     await this.service.disconnect();