Make tool_search visible in the tools picker (#311485)

- Add userDescription and toolReferenceName to tool_search registration
  so it passes the canBeReferencedInPrompt check
- Localize displayName and userDescription with l10n.t()
- Group tool under the 'vscode' toolset
- Remove redundant allowTools gate in agentIntent (already gated by
  models filter on registration and endpoint.supportsToolSearch)

Author: bhavyaus

extensions/copilot/src/extension/intents/node/agentIntent.ts

@@ -17,7 +17,7 @@ import { IAutomodeService } from '../../../platform/endpoint/node/automodeServic
 import { IEnvService } from '../../../platform/env/common/envService';
 import { ILogService } from '../../../platform/log/common/logService';
 import { IEditLogService } from '../../../platform/multiFileEdit/common/editLogService';
-import { CUSTOM_TOOL_SEARCH_NAME, isAnthropicContextEditingEnabled } from '../../../platform/networking/common/anthropic';
+import { isAnthropicContextEditingEnabled } from '../../../platform/networking/common/anthropic';
 import { IChatEndpoint } from '../../../platform/networking/common/networking';
 import { modelsWithoutResponsesContextManagement } from '../../../platform/networking/common/openai';
 import { INotebookService } from '../../../platform/notebook/common/notebookService';
@@ -141,8 +141,6 @@ export const getAgentTools = async (accessor: ServicesAccessor, request: vscode.
 		allowTools[ToolName.MultiReplaceString] = true;
 	}
 
-	allowTools[CUSTOM_TOOL_SEARCH_NAME] = !!model.supportsToolSearch;
-
 	const tools = toolsService.getEnabledTools(request, model, tool => {
 		if (typeof allowTools[tool.name] === 'boolean') {
 			return allowTools[tool.name];

extensions/copilot/src/extension/tools/node/toolSearchTool.ts

@@ -4,6 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 
 import type * as vscode from 'vscode';
+import * as l10n from '@vscode/l10n';
 import { ILogService } from '../../../platform/log/common/logService';
 import { CUSTOM_TOOL_SEARCH_NAME } from '../../../platform/networking/common/anthropic';
 import { LanguageModelTextPart, LanguageModelToolResult } from '../../../vscodeTypes';
@@ -56,10 +57,13 @@ export class ToolSearchTool implements ICopilotModelSpecificTool<IToolSearchPara
 ToolRegistry.registerModelSpecificTool(
 	{
 		name: CUSTOM_TOOL_SEARCH_NAME,
-		displayName: 'Search Tools',
+		displayName: l10n.t('Search Tools'),
+		toolReferenceName: 'toolSearch',
+		userDescription: l10n.t('Search for relevant tools by describing what you need'),
 		description: 'Search for relevant tools by describing what you need. Returns tool references for tools matching your query. Use this when you need to find a tool but aren\'t sure of its exact name. Check the availableDeferredTools list in your instructions for the full set of deferred tools, and include relevant tool names from that list in your query for more accurate results. Use broad queries to find all related tools in a single call rather than making multiple narrow searches.',
 		tags: [],
 		source: undefined,
+		toolSet: 'vscode',
 		inputSchema: {
 			type: 'object',
 			properties: {