chore(release): v0.34.0-preview.2

Co-authored-by: Abhi <43648792+abhipatel12@users.noreply.github.com>
Co-authored-by: Abhi <abhipatel@google.com>

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@google/gemini-cli",
-  "version": "0.34.0-nightly.20260310.4653b126f",
+  "version": "0.34.0-preview.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@google/gemini-cli",
-      "version": "0.34.0-nightly.20260310.4653b126f",
+      "version": "0.34.0-preview.2",
       "workspaces": [
         "packages/*"
       ],
@@ -16815,7 +16815,7 @@
     },
     "packages/a2a-server": {
       "name": "@google/gemini-cli-a2a-server",
-      "version": "0.34.0-nightly.20260310.4653b126f",
+      "version": "0.34.0-preview.2",
       "dependencies": {
         "@a2a-js/sdk": "0.3.11",
         "@google-cloud/storage": "^7.16.0",
@@ -16930,7 +16930,7 @@
     },
     "packages/cli": {
       "name": "@google/gemini-cli",
-      "version": "0.34.0-nightly.20260310.4653b126f",
+      "version": "0.34.0-preview.2",
       "license": "Apache-2.0",
       "dependencies": {
         "@agentclientprotocol/sdk": "^0.12.0",
@@ -17102,7 +17102,7 @@
     },
     "packages/core": {
       "name": "@google/gemini-cli-core",
-      "version": "0.34.0-nightly.20260310.4653b126f",
+      "version": "0.34.0-preview.2",
       "license": "Apache-2.0",
       "dependencies": {
         "@a2a-js/sdk": "0.3.11",
@@ -17358,7 +17358,7 @@
     },
     "packages/devtools": {
       "name": "@google/gemini-cli-devtools",
-      "version": "0.34.0-nightly.20260310.4653b126f",
+      "version": "0.34.0-preview.2",
       "license": "Apache-2.0",
       "dependencies": {
         "ws": "^8.16.0"
@@ -17373,7 +17373,7 @@
     },
     "packages/sdk": {
       "name": "@google/gemini-cli-sdk",
-      "version": "0.34.0-nightly.20260310.4653b126f",
+      "version": "0.34.0-preview.2",
       "license": "Apache-2.0",
       "dependencies": {
         "@google/gemini-cli-core": "file:../core",
@@ -17390,7 +17390,7 @@
     },
     "packages/test-utils": {
       "name": "@google/gemini-cli-test-utils",
-      "version": "0.34.0-nightly.20260310.4653b126f",
+      "version": "0.34.0-preview.2",
       "license": "Apache-2.0",
       "dependencies": {
         "@google/gemini-cli-core": "file:../core",
@@ -17407,7 +17407,7 @@
     },
     "packages/vscode-ide-companion": {
       "name": "gemini-cli-vscode-ide-companion",
-      "version": "0.34.0-nightly.20260310.4653b126f",
+      "version": "0.34.0-preview.2",
       "license": "LICENSE",
       "dependencies": {
         "@modelcontextprotocol/sdk": "^1.23.0",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@google/gemini-cli",
-  "version": "0.34.0-nightly.20260310.4653b126f",
+  "version": "0.34.0-preview.2",
   "engines": {
     "node": ">=20.0.0"
   },
@@ -14,7 +14,7 @@
     "url": "git+https://github.com/google-gemini/gemini-cli.git"
   },
   "config": {
-    "sandboxImageUri": "us-docker.pkg.dev/gemini-code-dev/gemini-cli/sandbox:0.34.0-nightly.20260310.4653b126f"
+    "sandboxImageUri": "us-docker.pkg.dev/gemini-code-dev/gemini-cli/sandbox:0.34.0-preview.2"
   },
   "scripts": {
     "start": "cross-env NODE_ENV=development node scripts/start.js",

packages/a2a-server/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@google/gemini-cli-a2a-server",
-  "version": "0.34.0-nightly.20260310.4653b126f",
+  "version": "0.34.0-preview.2",
   "description": "Gemini CLI A2A Server",
   "repository": {
     "type": "git",

packages/cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@google/gemini-cli",
-  "version": "0.34.0-nightly.20260310.4653b126f",
+  "version": "0.34.0-preview.2",
   "description": "Gemini CLI",
   "license": "Apache-2.0",
   "repository": {
@@ -26,7 +26,7 @@
     "dist"
   ],
   "config": {
-    "sandboxImageUri": "us-docker.pkg.dev/gemini-code-dev/gemini-cli/sandbox:0.34.0-nightly.20260310.4653b126f"
+    "sandboxImageUri": "us-docker.pkg.dev/gemini-code-dev/gemini-cli/sandbox:0.34.0-preview.2"
   },
   "dependencies": {
     "@agentclientprotocol/sdk": "^0.12.0",

packages/cli/src/config/extension-manager.test.ts

@@ -12,12 +12,13 @@ import { ExtensionManager } from './extension-manager.js';
 import { createTestMergedSettings } from './settings.js';
 import { createExtension } from '../test-utils/createExtension.js';
 import { EXTENSIONS_DIRECTORY_NAME } from './extensions/variables.js';
+import { themeManager } from '../ui/themes/theme-manager.js';
 import {
   TrustLevel,
   loadTrustedFolders,
   isWorkspaceTrusted,
 } from './trustedFolders.js';
-import { getRealPath } from '@google/gemini-cli-core';
+import { getRealPath, type CustomTheme } from '@google/gemini-cli-core';
 import type { MergedSettings } from './settings.js';
 
 const mockHomedir = vi.hoisted(() => vi.fn(() => '/tmp/mock-home'));
@@ -39,6 +40,26 @@ vi.mock('@google/gemini-cli-core', async (importOriginal) => {
   };
 });
 
+const testTheme: CustomTheme = {
+  type: 'custom',
+  name: 'MyTheme',
+  background: {
+    primary: '#282828',
+    diff: { added: '#2b3312', removed: '#341212' },
+  },
+  text: {
+    primary: '#ebdbb2',
+    secondary: '#a89984',
+    link: '#83a598',
+    accent: '#d3869b',
+  },
+  status: {
+    success: '#b8bb26',
+    warning: '#fabd2f',
+    error: '#fb4934',
+  },
+};
+
 describe('ExtensionManager', () => {
   let tempHomeDir: string;
   let tempWorkspaceDir: string;
@@ -66,6 +87,7 @@ describe('ExtensionManager', () => {
   });
 
   afterEach(() => {
+    themeManager.clearExtensionThemes();
     try {
       fs.rmSync(tempHomeDir, { recursive: true, force: true });
     } catch (_e) {
@@ -485,4 +507,45 @@ describe('ExtensionManager', () => {
       ).rejects.toThrow(/already installed/);
     });
   });
+
+  describe('early theme registration', () => {
+    it('should register themes with ThemeManager during loadExtensions for active extensions', async () => {
+      createExtension({
+        extensionsDir: userExtensionsDir,
+        name: 'themed-ext',
+        version: '1.0.0',
+        themes: [testTheme],
+      });
+
+      await extensionManager.loadExtensions();
+
+      expect(themeManager.getCustomThemeNames()).toContain(
+        'MyTheme (themed-ext)',
+      );
+    });
+
+    it('should not register themes for inactive extensions', async () => {
+      createExtension({
+        extensionsDir: userExtensionsDir,
+        name: 'disabled-ext',
+        version: '1.0.0',
+        themes: [testTheme],
+      });
+
+      // Disable the extension by creating an enablement override
+      const manager = new ExtensionManager({
+        enabledExtensionOverrides: ['none'],
+        settings: createTestMergedSettings(),
+        workspaceDir: tempWorkspaceDir,
+        requestConsent: vi.fn().mockResolvedValue(true),
+        requestSetting: null,
+      });
+
+      await manager.loadExtensions();
+
+      expect(themeManager.getCustomThemeNames()).not.toContain(
+        'MyTheme (disabled-ext)',
+      );
+    });
+  });
 });

packages/cli/src/config/extension-manager.ts

@@ -564,7 +564,7 @@ Would you like to attempt to install via "git clone" instead?`,
 
   protected override async startExtension(extension: GeminiCLIExtension) {
     await super.startExtension(extension);
-    if (extension.themes) {
+    if (extension.themes && !themeManager.hasExtensionThemes(extension.name)) {
       themeManager.registerExtensionThemes(extension.name, extension.themes);
     }
   }
@@ -624,6 +624,13 @@ Would you like to attempt to install via "git clone" instead?`,
 
         this.loadedExtensions = builtExtensions;
 
+        // Register extension themes early so they're available at startup.
+        for (const ext of this.loadedExtensions) {
+          if (ext.isActive && ext.themes) {
+            themeManager.registerExtensionThemes(ext.name, ext.themes);
+          }
+        }
+
         await Promise.all(
           this.loadedExtensions.map((ext) => this.maybeStartExtension(ext)),
         );

packages/cli/src/ui/themes/theme-manager.ts

@@ -241,6 +241,17 @@ class ThemeManager {
     }
   }
 
+  /**
+   * Checks if themes for a given extension are already registered.
+   * @param extensionName The name of the extension.
+   * @returns True if any themes from the extension are registered.
+   */
+  hasExtensionThemes(extensionName: string): boolean {
+    return Array.from(this.extensionThemes.keys()).some((name) =>
+      name.endsWith(`(${extensionName})`),
+    );
+  }
+
   /**
    * Clears all registered extension themes.
    * This is primarily for testing purposes to reset state between tests.

packages/core/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@google/gemini-cli-core",
-  "version": "0.34.0-nightly.20260310.4653b126f",
+  "version": "0.34.0-preview.2",
   "description": "Gemini CLI Core",
   "license": "Apache-2.0",
   "repository": {

packages/core/src/agents/agentLoader.ts

@@ -107,9 +107,11 @@ const localAgentSchema = z
     display_name: z.string().optional(),
     tools: z
       .array(
-        z.string().refine((val) => isValidToolName(val), {
-          message: 'Invalid tool name',
-        }),
+        z
+          .string()
+          .refine((val) => isValidToolName(val, { allowWildcards: true }), {
+            message: 'Invalid tool name',
+          }),
       )
       .optional(),
     model: z.string().optional(),

packages/core/src/agents/local-executor.test.ts

@@ -33,6 +33,7 @@ import {
   type PartListUnion,
   type Tool,
   type CallableTool,
+  type FunctionDeclaration,
 } from '@google/genai';
 import type { Config } from '../config/config.js';
 import { MockTool } from '../test-utils/mock-tool.js';
@@ -550,6 +551,34 @@ describe('LocalAgentExecutor', () => {
 
       getToolSpy.mockRestore();
     });
+
+    it('should not duplicate schemas when instantiated tools are provided in toolConfig', async () => {
+      // Create an instantiated mock tool
+      const instantiatedTool = new MockTool({ name: 'instantiated_tool' });
+
+      // Create an agent definition containing the instantiated tool
+      const definition = createTestDefinition([instantiatedTool]);
+
+      // Create the executor
+      const executor = await LocalAgentExecutor.create(
+        definition,
+        mockConfig,
+        onActivity,
+      );
+
+      // Extract the prepared tools list using the private method
+      const toolsList = (
+        executor as unknown as { prepareToolsList: () => FunctionDeclaration[] }
+      ).prepareToolsList();
+
+      // Filter for the specific tool schema
+      const foundSchemas = (
+        toolsList as unknown as FunctionDeclaration[]
+      ).filter((t: FunctionDeclaration) => t.name === 'instantiated_tool');
+
+      // Assert that there is exactly ONE schema for this tool
+      expect(foundSchemas).toHaveLength(1);
+    });
   });
 
   describe('run (Execution Loop and Logic)', () => {

packages/core/src/agents/local-executor.ts

@@ -16,7 +16,13 @@ import {
   type Schema,
 } from '@google/genai';
 import { ToolRegistry } from '../tools/tool-registry.js';
-import { DiscoveredMCPTool } from '../tools/mcp-tool.js';
+import { type AnyDeclarativeTool } from '../tools/tools.js';
+import {
+  DiscoveredMCPTool,
+  isMcpToolName,
+  parseMcpToolName,
+  MCP_TOOL_PREFIX,
+} from '../tools/mcp-tool.js';
 import { CompressionStatus } from '../core/turn.js';
 import { type ToolCallRequestInfo } from '../scheduler/types.js';
 import { type Message } from '../confirmation-bus/types.js';
@@ -141,28 +147,55 @@ export class LocalAgentExecutor<TOutput extends z.ZodTypeAny> {
       runtimeContext.getAgentRegistry().getAllAgentNames(),
     );
 
-    const registerToolByName = (toolName: string) => {
+    const registerToolInstance = (tool: AnyDeclarativeTool) => {
       // Check if the tool is a subagent to prevent recursion.
       // We do not allow agents to call other agents.
-      if (allAgentNames.has(toolName)) {
+      if (allAgentNames.has(tool.name)) {
         debugLogger.warn(
-          `[LocalAgentExecutor] Skipping subagent tool '${toolName}' for agent '${definition.name}' to prevent recursion.`,
+          `[LocalAgentExecutor] Skipping subagent tool '${tool.name}' for agent '${definition.name}' to prevent recursion.`,
         );
         return;
       }
 
+      agentToolRegistry.registerTool(tool);
+    };
+
+    const registerToolByName = (toolName: string) => {
+      // Handle global wildcard
+      if (toolName === '*') {
+        for (const tool of parentToolRegistry.getAllTools()) {
+          registerToolInstance(tool);
+        }
+        return;
+      }
+
+      // Handle MCP wildcards
+      if (isMcpToolName(toolName)) {
+        if (toolName === `${MCP_TOOL_PREFIX}*`) {
+          for (const tool of parentToolRegistry.getAllTools()) {
+            if (tool instanceof DiscoveredMCPTool) {
+              registerToolInstance(tool);
+            }
+          }
+          return;
+        }
+
+        const parsed = parseMcpToolName(toolName);
+        if (parsed.serverName && parsed.toolName === '*') {
+          for (const tool of parentToolRegistry.getToolsByServer(
+            parsed.serverName,
+          )) {
+            registerToolInstance(tool);
+          }
+          return;
+        }
+      }
+
       // If the tool is referenced by name, retrieve it from the parent
       // registry and register it with the agent's isolated registry.
       const tool = parentToolRegistry.getTool(toolName);
       if (tool) {
-        if (tool instanceof DiscoveredMCPTool) {
-          // Subagents MUST use fully qualified names for MCP tools to ensure
-          // unambiguous tool calls and to comply with policy requirements.
-          // We automatically "upgrade" any MCP tool to its qualified version.
-          agentToolRegistry.registerTool(tool.asFullyQualifiedTool());
-        } else {
-          agentToolRegistry.registerTool(tool);
-        }
+        registerToolInstance(tool);
       }
     };
 
@@ -1171,22 +1204,14 @@ export class LocalAgentExecutor<TOutput extends z.ZodTypeAny> {
     const { toolConfig, outputConfig } = this.definition;
 
     if (toolConfig) {
-      const toolNamesToLoad: string[] = [];
       for (const toolRef of toolConfig.tools) {
-        if (typeof toolRef === 'string') {
-          toolNamesToLoad.push(toolRef);
-        } else if (typeof toolRef === 'object' && 'schema' in toolRef) {
-          // Tool instance with an explicit schema property.
-          toolsList.push(toolRef.schema);
-        } else {
+        if (typeof toolRef === 'object' && !('schema' in toolRef)) {
           // Raw `FunctionDeclaration` object.
           toolsList.push(toolRef);
         }
       }
-      // Add schemas from tools that were registered by name.
-      toolsList.push(
-        ...this.toolRegistry.getFunctionDeclarationsFiltered(toolNamesToLoad),
-      );
+      // Add schemas from tools that were explicitly registered by name, wildcard, or instance.
+      toolsList.push(...this.toolRegistry.getFunctionDeclarations());
     }
 
     // Always inject complete_task.

packages/core/src/tools/mcp-tool.ts

@@ -58,6 +58,7 @@ export function parseMcpToolName(name: string): {
   // Remove the prefix
   const withoutPrefix = name.slice(MCP_TOOL_PREFIX.length);
   // The first segment is the server name, the rest is the tool name
+  // Must be strictly `server_tool` where neither are empty
   const match = withoutPrefix.match(/^([^_]+)_(.+)$/);
   if (match) {
     return {
@@ -390,25 +391,6 @@ export class DiscoveredMCPTool extends BaseDeclarativeTool<
       `${this.serverName}${MCP_QUALIFIED_NAME_SEPARATOR}${this.serverToolName}`,
     );
   }
-
-  asFullyQualifiedTool(): DiscoveredMCPTool {
-    return new DiscoveredMCPTool(
-      this.mcpTool,
-      this.serverName,
-      this.serverToolName,
-      this.description,
-      this.parameterSchema,
-      this.messageBus,
-      this.trust,
-      this.isReadOnly,
-      this.getFullyQualifiedName(),
-      this.cliConfig,
-      this.extensionName,
-      this.extensionId,
-      this._toolAnnotations,
-    );
-  }
-
   protected createInvocation(
     params: ToolParams,
     messageBus: MessageBus,

packages/core/src/tools/tool-names.test.ts

@@ -25,7 +25,8 @@ vi.mock('./tool-names.js', async (importOriginal) => {
     ...actual,
     TOOL_LEGACY_ALIASES: mockedAliases,
     isValidToolName: vi.fn().mockImplementation((name: string, options) => {
-      if (mockedAliases[name]) return true;
+      if (Object.prototype.hasOwnProperty.call(mockedAliases, name))
+        return true;
       return actual.isValidToolName(name, options);
     }),
     getToolAliases: vi.fn().mockImplementation((name: string) => {
@@ -55,11 +56,9 @@ describe('tool-names', () => {
       expect(isValidToolName(`${DISCOVERED_TOOL_PREFIX}my_tool`)).toBe(true);
     });
 
-    it('should validate MCP tool names (server__tool)', () => {
-      expect(isValidToolName('server__tool')).toBe(true);
-      expect(isValidToolName('my-server__my-tool')).toBe(true);
-      expect(isValidToolName('my.server__my:tool')).toBe(true);
-      expect(isValidToolName('my-server...truncated__tool')).toBe(true);
+    it('should validate modern MCP FQNs (mcp_server_tool)', () => {
+      expect(isValidToolName('mcp_server_tool')).toBe(true);
+      expect(isValidToolName('mcp_my-server_my-tool')).toBe(true);
     });
 
     it('should validate legacy tool aliases', async () => {
@@ -69,28 +68,33 @@ describe('tool-names', () => {
       }
     });
 
-    it('should reject invalid tool names', () => {
-      expect(isValidToolName('')).toBe(false);
-      expect(isValidToolName('invalid-name')).toBe(false);
-      expect(isValidToolName('server__')).toBe(false);
-      expect(isValidToolName('__tool')).toBe(false);
-      expect(isValidToolName('server__tool__extra')).toBe(false);
+    it('should return false for invalid tool names', () => {
+      expect(isValidToolName('invalid-tool-name')).toBe(false);
+      expect(isValidToolName('mcp_server')).toBe(false);
+      expect(isValidToolName('mcp__tool')).toBe(false);
+      expect(isValidToolName('mcp_invalid server_tool')).toBe(false);
+      expect(isValidToolName('mcp_server_invalid tool')).toBe(false);
+      expect(isValidToolName('mcp_server_')).toBe(false);
     });
 
     it('should handle wildcards when allowed', () => {
       // Default: not allowed
       expect(isValidToolName('*')).toBe(false);
-      expect(isValidToolName('server__*')).toBe(false);
+      expect(isValidToolName('mcp_*')).toBe(false);
+      expect(isValidToolName('mcp_server_*')).toBe(false);
 
       // Explicitly allowed
       expect(isValidToolName('*', { allowWildcards: true })).toBe(true);
-      expect(isValidToolName('server__*', { allowWildcards: true })).toBe(true);
+      expect(isValidToolName('mcp_*', { allowWildcards: true })).toBe(true);
+      expect(isValidToolName('mcp_server_*', { allowWildcards: true })).toBe(
+        true,
+      );
 
       // Invalid wildcards
-      expect(isValidToolName('__*', { allowWildcards: true })).toBe(false);
-      expect(isValidToolName('server__tool*', { allowWildcards: true })).toBe(
-        false,
-      );
+      expect(isValidToolName('mcp__*', { allowWildcards: true })).toBe(false);
+      expect(
+        isValidToolName('mcp_server_tool*', { allowWildcards: true }),
+      ).toBe(false);
     });
   });
 

packages/core/src/tools/tool-names.ts

@@ -221,6 +221,12 @@ export const DISCOVERED_TOOL_PREFIX = 'discovered_tool_';
 /**
  * List of all built-in tool names.
  */
+import {
+  isMcpToolName,
+  parseMcpToolName,
+  MCP_TOOL_PREFIX,
+} from './mcp-tool.js';
+
 export const ALL_BUILTIN_TOOL_NAMES = [
   GLOB_TOOL_NAME,
   WRITE_TODOS_TOOL_NAME,
@@ -290,25 +296,44 @@ export function isValidToolName(
     return true;
   }
 
-  // MCP tools (format: server__tool)
-  if (name.includes('__')) {
-    const parts = name.split('__');
-    if (parts.length !== 2 || parts[0].length === 0 || parts[1].length === 0) {
+  // Handle standard MCP FQNs (mcp_server_tool or wildcards mcp_*, mcp_server_*)
+  if (isMcpToolName(name)) {
+    // Global wildcard: mcp_*
+    if (name === `${MCP_TOOL_PREFIX}*` && options.allowWildcards) {
+      return true;
+    }
+
+    // Explicitly reject names with empty server component (e.g. mcp__tool)
+    if (name.startsWith(`${MCP_TOOL_PREFIX}_`)) {
       return false;
     }
 
-    const server = parts[0];
-    const tool = parts[1];
+    const parsed = parseMcpToolName(name);
+    // Ensure that both components are populated. parseMcpToolName splits at the second _,
+    // so `mcp__tool` has serverName="", toolName="tool"
+    if (parsed.serverName && parsed.toolName) {
+      // Basic slug validation for server and tool names.
+      // We allow dots (.) and colons (:) as they are valid in function names and
+      // used for truncation markers.
+      const slugRegex = /^[a-z0-9_.:-]+$/i;
 
-    if (tool === '*') {
-      return !!options.allowWildcards;
+      if (!slugRegex.test(parsed.serverName)) {
+        return false;
+      }
+
+      if (parsed.toolName === '*') {
+        return options.allowWildcards === true;
+      }
+
+      // A tool name consisting only of underscores is invalid.
+      if (/^_*$/.test(parsed.toolName)) {
+        return false;
+      }
+
+      return slugRegex.test(parsed.toolName);
     }
 
-    // Basic slug validation for server and tool names.
-    // We allow dots (.) and colons (:) as they are valid in function names and
-    // used for truncation markers.
-    const slugRegex = /^[a-z0-9_.:-]+$/i;
-    return slugRegex.test(server) && slugRegex.test(tool);
+    return false;
   }
 
   return false;

packages/core/src/tools/tool-registry.test.ts

@@ -310,13 +310,13 @@ describe('ToolRegistry', () => {
         excludedTools: ['tool-a'],
       },
       {
-        name: 'should match simple MCP tool names, when qualified or unqualified',
-        tools: [mcpTool, mcpTool.asFullyQualifiedTool()],
+        name: 'should match simple MCP tool names',
+        tools: [mcpTool],
         excludedTools: [mcpTool.name],
       },
       {
-        name: 'should match qualified MCP tool names when qualified or unqualified',
-        tools: [mcpTool, mcpTool.asFullyQualifiedTool()],
+        name: 'should match qualified MCP tool names',
+        tools: [mcpTool],
         excludedTools: [mcpTool.name],
       },
       {
@@ -414,9 +414,9 @@ describe('ToolRegistry', () => {
       const toolName = 'my-tool';
       const mcpTool = createMCPTool(serverName, toolName, 'desc');
 
-      // Register same MCP tool twice (one as alias, one as qualified)
+      // Register same MCP tool twice
+      toolRegistry.registerTool(mcpTool);
       toolRegistry.registerTool(mcpTool);
-      toolRegistry.registerTool(mcpTool.asFullyQualifiedTool());
 
       const toolNames = toolRegistry.getAllToolNames();
       expect(toolNames).toEqual([`mcp_${serverName}_${toolName}`]);
@@ -698,9 +698,8 @@ describe('ToolRegistry', () => {
       const toolName = 'my-tool';
       const mcpTool = createMCPTool(serverName, toolName, 'description');
 
-      // Register both alias and qualified
       toolRegistry.registerTool(mcpTool);
-      toolRegistry.registerTool(mcpTool.asFullyQualifiedTool());
+      toolRegistry.registerTool(mcpTool);
 
       const declarations = toolRegistry.getFunctionDeclarations();
       expect(declarations).toHaveLength(1);

packages/core/src/tools/tool-registry.ts

@@ -222,14 +222,10 @@ export class ToolRegistry {
    */
   registerTool(tool: AnyDeclarativeTool): void {
     if (this.allKnownTools.has(tool.name)) {
-      if (tool instanceof DiscoveredMCPTool) {
-        tool = tool.asFullyQualifiedTool();
-      } else {
-        // Decide on behavior: throw error, log warning, or allow overwrite
-        debugLogger.warn(
-          `Tool with name "${tool.name}" is already registered. Overwriting.`,
-        );
-      }
+      // Decide on behavior: throw error, log warning, or allow overwrite
+      debugLogger.warn(
+        `Tool with name "${tool.name}" is already registered. Overwriting.`,
+      );
     }
     this.allKnownTools.set(tool.name, tool);
   }
@@ -594,7 +590,17 @@ export class ToolRegistry {
     for (const name of toolNames) {
       const tool = this.getTool(name);
       if (tool) {
-        declarations.push(tool.getSchema(modelId));
+        let schema = tool.getSchema(modelId);
+
+        // Ensure the schema name matches the qualified name for MCP tools
+        if (tool instanceof DiscoveredMCPTool) {
+          schema = {
+            ...schema,
+            name: tool.getFullyQualifiedName(),
+          };
+        }
+
+        declarations.push(schema);
       }
     }
     return declarations;
@@ -670,17 +676,6 @@ export class ToolRegistry {
       }
     }
 
-    if (!tool && name.includes('__')) {
-      for (const t of this.allKnownTools.values()) {
-        if (t instanceof DiscoveredMCPTool) {
-          if (t.getFullyQualifiedName() === name) {
-            tool = t;
-            break;
-          }
-        }
-      }
-    }
-
     if (tool && this.isActiveTool(tool)) {
       return tool;
     }

packages/devtools/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@google/gemini-cli-devtools",
-  "version": "0.34.0-nightly.20260310.4653b126f",
+  "version": "0.34.0-preview.2",
   "license": "Apache-2.0",
   "type": "module",
   "main": "dist/src/index.js",

packages/sdk/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@google/gemini-cli-sdk",
-  "version": "0.34.0-nightly.20260310.4653b126f",
+  "version": "0.34.0-preview.2",
   "description": "Gemini CLI SDK",
   "license": "Apache-2.0",
   "repository": {

packages/test-utils/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@google/gemini-cli-test-utils",
-  "version": "0.34.0-nightly.20260310.4653b126f",
+  "version": "0.34.0-preview.2",
   "private": true,
   "main": "src/index.ts",
   "license": "Apache-2.0",

packages/vscode-ide-companion/package.json

@@ -2,7 +2,7 @@
   "name": "gemini-cli-vscode-ide-companion",
   "displayName": "Gemini CLI Companion",
   "description": "Enable Gemini CLI with direct access to your IDE workspace.",
-  "version": "0.34.0-nightly.20260310.4653b126f",
+  "version": "0.34.0-preview.2",
   "publisher": "google",
   "icon": "assets/icon.png",
   "repository": {