Skip to main content
Glama

browser_switch_to_original_window

Switch back to the original browser window after working with multiple windows or tabs during web automation tasks.

Instructions

Switches back to the original browser window

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Implementation Reference

  • Inline handler function that switches the browser context back to the original (first) window handle by retrieving all handles and selecting index 0.
    server.tool('browser_switch_to_original_window', 'Switches back to the original browser window', {}, async () => {
      try {
        const driver = stateManager.getDriver();
        const windowHandles = await driver.getAllWindowHandles();
        const originalHandle = windowHandles[0];
        if (!originalHandle) {
          return {
            content: [
              {
                type: 'text',
                text: `No original window handle found.`,
              },
            ],
          };
        }
        await driver.switchTo().window(originalHandle);
        return {
          content: [{ type: 'text', text: `Switched to original window` }],
        };
      } catch (e) {
        return {
          content: [
            {
              type: 'text',
              text: `Error switching to original window: ${(e as Error).message}`,
            },
          ],
        };
      }
    });
  • Registers the 'browser_switch_to_original_window' tool using server.tool with no input parameters.
    server.tool('browser_switch_to_original_window', 'Switches back to the original browser window', {}, async () => {
      try {
        const driver = stateManager.getDriver();
        const windowHandles = await driver.getAllWindowHandles();
        const originalHandle = windowHandles[0];
        if (!originalHandle) {
          return {
            content: [
              {
                type: 'text',
                text: `No original window handle found.`,
              },
            ],
          };
        }
        await driver.switchTo().window(originalHandle);
        return {
          content: [{ type: 'text', text: `Switched to original window` }],
        };
      } catch (e) {
        return {
          content: [
            {
              type: 'text',
              text: `Error switching to original window: ${(e as Error).message}`,
            },
          ],
        };
      }
    });
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden of behavioral disclosure. While 'switches back' implies a navigation action, it doesn't specify what constitutes the 'original window' (e.g., first opened window, main tab), whether this affects browser state or focus, or what happens if no original window exists. For a mutation tool with zero annotation coverage, this is insufficient.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence that states the tool's purpose without any wasted words. It's appropriately sized for a simple switching operation and front-loads the core action.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's simplicity (0 parameters, no output schema), the description is minimally adequate but lacks important context. Without annotations, it should clarify behavioral aspects like what defines the 'original window' and potential side effects. The description meets basic needs but leaves gaps for a mutation tool in a browser automation context.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool has 0 parameters with 100% schema description coverage, so the schema fully documents the lack of inputs. The description doesn't need to add parameter information, and it correctly doesn't mention any parameters. A baseline of 4 is appropriate for zero-parameter tools where the schema handles documentation.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('switches back') and target ('original browser window'), providing a specific verb+resource combination. However, it doesn't differentiate from sibling tools like 'browser_switch_to_default_content' or 'browser_switch_to_parent_frame', which serve similar switching purposes but target different contexts.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives. There are multiple sibling switching tools (e.g., 'browser_switch_to_window', 'browser_switch_to_default_content'), but the description doesn't indicate when this specific 'original window' switch is appropriate or what prerequisites might be needed.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Install Server

Other Tools

Latest Blog Posts

MCP directory API

We provide all the information about MCP servers via our MCP API.

curl -X GET 'https://glama.ai/api/mcp/v1/servers/pshivapr/selenium-mcp'

If you have feedback or need assistance with the MCP directory API, please join our Discord server