Concurrent Browser MCP

Instructions

Implementation Reference

• src/tools.ts:769-789 (handler)

  The main handler function that executes the browser_select_option tool by calling Playwright's page.selectOption method on the specified selector with the given value.

  private async selectOption(instanceId: string, selector: string, value: string, timeout: number): Promise<ToolResult> {
    const instance = this.browserManager.getInstance(instanceId);
    if (!instance) {
      return { success: false, error: `Instance ${instanceId} not found` };
    }
  
    try {
      await instance.page.selectOption(selector, value, { timeout });
      return {
        success: true,
        data: { selector, value, selected: true },
        instanceId
      };
    } catch (error) {
      return {
        success: false,
        error: `Select option failed: ${error instanceof Error ? error.message : error}`,
        instanceId
      };
    }
  }

• src/tools.ts:265-289 (schema)

  The input schema and metadata (name, description) for the browser_select_option tool, used for validation and MCP registration.

  name: 'browser_select_option',
  description: 'Select an option from a dropdown',
  inputSchema: {
    type: 'object',
    properties: {
      instanceId: {
        type: 'string',
        description: 'Instance ID'
      },
      selector: {
        type: 'string',
        description: 'Element selector',
      },
      value: {
        type: 'string',
        description: 'Value to select',
      },
      timeout: {
        type: 'number',
        description: 'Timeout in milliseconds',
        default: 30000
      }
    },
    required: ['instanceId', 'selector', 'value']
  }

• src/tools.ts:550-552 (registration)

  The dispatch case in the executeTools method that routes calls to the selectOption handler.

  case 'browser_select_option':
    return await this.selectOption(args.instanceId, args.selector, args.value, args.timeout || 30000);