first commit

app/chrome-extension/common/tool-handler.ts

@@ -0,0 +1,24 @@
+import type { CallToolResult, TextContent, ImageContent } from '@modelcontextprotocol/sdk/types.js';
+
+export interface ToolResult extends CallToolResult {
+  content: (TextContent | ImageContent)[];
+  isError: boolean;
+}
+
+export interface ToolExecutor {
+  execute(args: any): Promise<ToolResult>;
+}
+
+export const createErrorResponse = (
+  message: string = 'Unknown error, please try again',
+): ToolResult => {
+  return {
+    content: [
+      {
+        type: 'text',
+        text: message,
+      },
+    ],
+    isError: true,
+  };
+};