MCP Accessibility Scanner

Instructions

Implementation Reference

• src/tools/keyboard.ts:37-46 (handler)

  The handler function that implements the core logic of the 'browser_press_key' tool by pressing the specified key using the Playwright page.keyboard.press method.

    handle: async (tab, params, response) => {
      response.setIncludeSnapshot();
      response.addCode(`// Press ${params.key}`);
      response.addCode(`await page.keyboard.press('${params.key}');`);
  
      await tab.waitForCompletion(async () => {
        await tab.page.keyboard.press(params.key);
      });
    },
  });

• src/tools/keyboard.ts:27-35 (schema)

  The Zod schema definition for the 'browser_press_key' tool, specifying input as a 'key' string and marking it as 'destructive'.

  schema: {
    name: 'browser_press_key',
    title: 'Press a key',
    description: 'Press a key on the keyboard',
    inputSchema: z.object({
      key: z.string().describe('Name of the key to press or a character to generate, such as `ArrowLeft` or `a`'),
    }),
    type: 'destructive',
  },

• src/tools.ts:38-56 (registration)

  The 'browser_press_key' tool is registered as part of the 'keyboard' tools spread into the central 'allTools' array, which is filtered and provided to the MCP server backend.

  export const allTools: Tool<any>[] = [
    ...common,
    ...console,
    ...dialogs,
    ...evaluate,
    ...files,
    ...form,
    ...install,
    ...keyboard,
    ...navigate,
    ...network,
    ...mouse,
    ...pdf,
    ...screenshot,
    ...snapshot,
    ...tabs,
    ...wait,
    ...verify,
  ];