Skip showing tool limit error when tst is enabled (microsoft#3160)

Author: bhavyaus

src/extension/conversation/vscode-node/languageModelAccess.ts

@@ -11,6 +11,7 @@ import { CopilotToken } from '../../../platform/authentication/common/copilotTok
 import { IBlockedExtensionService } from '../../../platform/chat/common/blockedExtensionService';
 import { ChatFetchResponseType, ChatLocation, getErrorDetailsFromChatFetchError } from '../../../platform/chat/common/commonTypes';
 import { getTextPart } from '../../../platform/chat/common/globalStringUtils';
+import { IConfigurationService } from '../../../platform/configuration/common/configurationService';
 import { EmbeddingType, getWellKnownEmbeddingTypeInfo, IEmbeddingsComputer } from '../../../platform/embeddings/common/embeddingsComputer';
 import { IEndpointProvider } from '../../../platform/endpoint/common/endpointProvider';
 import { CustomDataPartMimeTypes } from '../../../platform/endpoint/common/endpointTypes';
@@ -21,6 +22,7 @@ import { IAutomodeService } from '../../../platform/endpoint/node/automodeServic
 import { IEnvService, isScenarioAutomation } from '../../../platform/env/common/envService';
 import { IVSCodeExtensionContext } from '../../../platform/extContext/common/extensionContext';
 import { ILogService } from '../../../platform/log/common/logService';
+import { isAnthropicToolSearchEnabled } from '../../../platform/networking/common/anthropic';
 import { FinishedCallback, OpenAiFunctionTool, OptionalChatRequestParams } from '../../../platform/networking/common/fetch';
 import { IChatEndpoint, IEndpoint } from '../../../platform/networking/common/networking';
 import { IExperimentationService } from '../../../platform/telemetry/common/nullExperimentationService';
@@ -427,6 +429,7 @@ export class CopilotLanguageModelWrapper extends Disposable {
 		@IAuthenticationService private readonly _authenticationService: IAuthenticationService,
 		@IEnvService private readonly _envService: IEnvService,
 		@IEndpointProvider private readonly _endpointProvider: IEndpointProvider,
+		@IConfigurationService private readonly _configurationService: IConfigurationService,
 	) {
 		super();
 	}
@@ -487,7 +490,7 @@ export class CopilotLanguageModelWrapper extends Disposable {
 			throw new Error('Message exceeds token limit.');
 		}
 
-		if (_options.tools && _options.tools.length > 128) {
+		if (_options.tools && _options.tools.length > 128 && !isAnthropicToolSearchEnabled(_endpoint, this._configurationService, this._expService)) {
 			throw new Error('Cannot have more than 128 tools per request.');
 		}