PlayMCP Browser Automation Server

Instructions

Implementation Reference

• src/controllers/playwright.ts:708-720 (handler)

  The core handler function in PlaywrightController that resizes the browser viewport by setting the page viewport size.
  async resize(width: number, height: number): Promise<void> { try { if (!this.isInitialized() || !this.state.page) { throw new Error('Browser not initialized'); } this.log('Resizing viewport', { width, height }); await this.state.page.setViewportSize({ width, height }); this.log('Resize complete'); } catch (error: any) { console.error('Resize error:', error); throw new BrowserError('Failed to resize viewport', 'Check if width and height are positive numbers'); } }
• src/server.ts:359-370 (schema)

  Tool schema definition including name, description, and input schema requiring width and height as numbers.
  const RESIZE_TOOL: Tool = { name: "resize", description: "Resize the browser viewport", inputSchema: { type: "object", properties: { width: { type: "number" }, height: { type: "number" } }, required: ["width", "height"] } };
• src/server.ts:542-542 (registration)

  Registration of the resize tool in the tools object passed to MCP server capabilities.
  resize: RESIZE_TOOL,
• src/server.ts:873-884 (helper)

  Tool dispatch logic in the callTool handler: validates arguments, calls the controller resize method, and returns success response.
  case 'resize': { if (typeof args.width !== 'number' || typeof args.height !== 'number') { return { content: [{ type: "text", text: "Width and height are required" }], isError: true }; } await playwrightController.resize(args.width, args.height); return { content: [{ type: "text", text: "Browser resized successfully" }] }; }