diff --git a/packages/agents-a365-tooling-extensions-claude/src/McpToolRegistrationService.ts b/packages/agents-a365-tooling-extensions-claude/src/McpToolRegistrationService.ts
index bfe39fa..9ed1688 100644
--- a/packages/agents-a365-tooling-extensions-claude/src/McpToolRegistrationService.ts
+++ b/packages/agents-a365-tooling-extensions-claude/src/McpToolRegistrationService.ts
@@ -28,7 +28,7 @@ export class McpToolRegistrationService {
     environmentId: string,
     authorization: Authorization,
     turnContext: TurnContext,
-    authToken: string
+    authToken: string = ''
   ): Promise<void> {
 
     if (!agentOptions) {
diff --git a/packages/agents-a365-tooling-extensions-langchain/src/McpToolRegistrationService.ts b/packages/agents-a365-tooling-extensions-langchain/src/McpToolRegistrationService.ts
index 555f9cd..54d6f5e 100644
--- a/packages/agents-a365-tooling-extensions-langchain/src/McpToolRegistrationService.ts
+++ b/packages/agents-a365-tooling-extensions-langchain/src/McpToolRegistrationService.ts
@@ -25,7 +25,7 @@ export class McpToolRegistrationService {
     environmentId: string,
     authorization: Authorization,
     turnContext: TurnContext,
-    authToken: string
+    authToken: string = ''
   ): Promise<DynamicStructuredTool[]> {
 
     if (!mcpClientConfig) {
diff --git a/packages/agents-a365-tooling-extensions-openai/src/McpToolRegistrationService.ts b/packages/agents-a365-tooling-extensions-openai/src/McpToolRegistrationService.ts
index b3fa40a..a292c04 100644
--- a/packages/agents-a365-tooling-extensions-openai/src/McpToolRegistrationService.ts
+++ b/packages/agents-a365-tooling-extensions-openai/src/McpToolRegistrationService.ts
@@ -21,7 +21,7 @@ export class McpToolRegistrationService {
     environmentId: string,
     authorization: Authorization,
     turnContext: TurnContext,
-    authToken: string
+    authToken: string = ''
   ): Promise<void> {
 
     if (!agent) {