diff --git a/extensions/copilot/src/extension/prompts/node/panel/toolCalling.tsx b/extensions/copilot/src/extension/prompts/node/panel/toolCalling.tsx
index 160566dca24..4be8cb9de0f 100644
--- a/extensions/copilot/src/extension/prompts/node/panel/toolCalling.tsx
+++ b/extensions/copilot/src/extension/prompts/node/panel/toolCalling.tsx
@@ -728,8 +728,8 @@ class PrimitiveToolResult<T extends IPrimitiveToolResultProps> extends PromptEle
 
 	constructor(
 		props: T,
-		@IPromptEndpoint protected readonly endpoint: IPromptEndpoint,
-		@IAuthenticationService private readonly authService: IAuthenticationService,
+		@IPromptEndpoint protected readonly endpoint?: IPromptEndpoint,
+		@IAuthenticationService private readonly authService?: IAuthenticationService,
 		@ILogService private readonly logService?: ILogService,
 		@IImageService private readonly imageService?: IImageService,
 		@IConfigurationService private readonly configurationService?: IConfigurationService,
@@ -780,7 +780,7 @@ class PrimitiveToolResult<T extends IPrimitiveToolResultProps> extends PromptEle
 	}
 
 	protected async onImage(part: LanguageModelDataPart, _imageIndex?: number) {
-		if (!this.endpoint.supportsVision) {
+		if (!this.endpoint?.supportsVision) {
 			return '[Image content is not available because vision is not supported by the current model or is disabled by your organization.]';
 		}
 
@@ -789,7 +789,7 @@ class PrimitiveToolResult<T extends IPrimitiveToolResultProps> extends PromptEle
 			: false;
 
 		// Anthropic (from CAPI) currently does not support image uploads from tool calls.
-		const canUpload = uploadsEnabled && modelCanUseMcpResultImageURL(this.endpoint);
+		const canUpload = uploadsEnabled && !!this.endpoint && modelCanUseMcpResultImageURL(this.endpoint);
 
 		// Enforce image budgets only when images will be inlined as base64.
 		// When uploads are available, the request body stays small (URL reference).
@@ -820,10 +820,10 @@ class PrimitiveToolResult<T extends IPrimitiveToolResultProps> extends PromptEle
 		// Only call getGitHubSession when uploads are potentially available
 		let uploadToken: string | undefined;
 		if (canUpload) {
-			uploadToken = (await this.authService.getGitHubSession('any', { silent: true }))?.accessToken;
+			uploadToken = (await this.authService?.getGitHubSession('any', { silent: true }))?.accessToken;
 		}
 
-		return Promise.resolve(imageDataPartToTSX(part, uploadToken, this.endpoint.urlOrRequestMetadata, this.logService, this.imageService));
+		return Promise.resolve(imageDataPartToTSX(part, uploadToken, this.endpoint?.urlOrRequestMetadata, this.logService, this.imageService));
 	}
 
 	protected onTSX(part: JSONTree.PromptElementJSON) {
@@ -956,8 +956,8 @@ export class ToolResult extends PrimitiveToolResult<IToolResultProps> {
 			return content;
 		}
 
-		const tokens = await this.endpoint.acquireTokenizer().tokenLength(content);
-		if (tokens < truncateAtTokens) {
+		const tokens = await this.endpoint?.acquireTokenizer().tokenLength(content);
+		if (!tokens || tokens < truncateAtTokens) {
 			return content;
 		}