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puppeteer_navigate

Automate web browsing by navigating to specified URLs using browser automation, enabling tasks like content retrieval, interaction, and JavaScript execution.

Instructions

Navigate to a URL

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
urlYes

Implementation Reference

  • The core handler logic for the puppeteer_navigate tool, which navigates the Puppeteer-controlled page to the specified URL and returns a confirmation message.
    case "puppeteer_navigate":
      await page.goto(args.url);
      return {
        content: [
          {
            type: "text",
            text: `Navigated to ${args.url}`,
          },
        ],
        isError: false,
      };
  • Defines the input schema for the puppeteer_navigate tool, requiring a single 'url' string parameter.
    inputSchema: {
      type: "object",
      properties: {
        url: { type: "string" },
      },
      required: ["url"],
    },
  • index.ts:278-280 (registration)
    Registers the puppeteer_navigate tool (among others) by providing the TOOLS list in response to list tools requests.
    server.setRequestHandler(ListToolsRequestSchema, async () => ({
      tools: TOOLS,
    }));
  • index.ts:282-284 (registration)
    Registers the call tool handler which routes puppeteer_navigate calls to the appropriate switch case in handleToolCall.
    server.setRequestHandler(CallToolRequestSchema, async (request) =>
      handleToolCall(request.params.name, request.params.arguments ?? {})
    );
Behavior2/5

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

With no annotations, the description carries full burden but provides minimal behavioral context. It implies a navigation action but doesn't disclose traits like whether it waits for page load, handles errors, requires authentication, or has side effects (e.g., changing browser state). This leaves significant gaps for a tool that likely interacts with a browser.

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 extremely concise with a single sentence ('Navigate to a URL') that is front-loaded and wastes no words. It directly states the tool's function without unnecessary elaboration.

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

Completeness2/5

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

Given no annotations, no output schema, and a simple input schema, the description is incomplete. It doesn't explain what happens after navigation (e.g., returns success/failure, page content), error handling, or dependencies like requiring a Puppeteer page context, which are critical for effective use.

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 description adds meaning by specifying that the 'url' parameter is for navigation, which clarifies its purpose beyond the schema's generic string type. With 0% schema description coverage and only one parameter, this compensates adequately, though it could detail URL format or constraints.

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

Purpose3/5

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

The description 'Navigate to a URL' clearly states the action (navigate) and target (URL), but it's somewhat vague about what 'navigate' entails in the Puppeteer context. It distinguishes from siblings like 'make_http_request' (HTTP vs browser navigation) and 'puppeteer_page_history' (navigation vs history tracking), but doesn't specify browser/page context explicitly.

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?

No guidance is provided about when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., needing an existing page), when not to use it (e.g., for non-browser requests), or comparisons to siblings like 'make_http_request' for HTTP calls versus browser navigation.

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

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