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navigate

Directs the browser to load a specified URL for automated web testing and interaction.

Instructions

Navigate to a specific URL in the browser

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
urlYesThe URL to navigate to

Implementation Reference

  • The core handler function implementing the 'navigate' tool logic: initializes the browser page and navigates to the given URL using Puppeteer, returning a confirmation message.
    async navigate(url: string) {
        const page = await this.init();
        this.consoleLogs = []; // Clear logs on new navigation
        await page.goto(url, { waitUntil: 'networkidle0' });
        return `Navigated to ${url}`;
    }
  • Defines the input schema, name, and description for the 'navigate' tool, used for validation and listing.
        name: "navigate",
        description: "Navigate to a specific URL in the browser",
        inputSchema: {
            type: "object",
            properties: {
                url: { type: "string", description: "The URL to navigate to" },
            },
            required: ["url"],
        },
    },
  • src/index.ts:120-122 (registration)
    Registers the 'navigate' tool handler in the switch statement of the CallToolRequestSchema, dispatching calls to browserManager.navigate.
    case "navigate":
        result = await browserManager.navigate(String(args?.url));
        break;
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions navigation but doesn't describe what happens after navigation (e.g., page load behavior, error handling, or whether it waits for completion). This leaves significant gaps in understanding the tool's behavior.

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, clear sentence that directly states the tool's function without any unnecessary words. It's perfectly front-loaded and efficiently communicates the core purpose in minimal space.

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?

For a browser navigation tool with no annotations and no output schema, the description is insufficient. It doesn't address what happens after navigation, potential errors, or how it interacts with other browser tools, leaving the agent with incomplete context for effective use.

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

Parameters3/5

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

The schema description coverage is 100%, with the single parameter 'url' clearly documented in the schema. The description adds no additional semantic context beyond what's already in the schema, so it meets the baseline score without providing extra value.

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 ('navigate to') and target ('specific URL in the browser'), making the purpose immediately understandable. However, it doesn't differentiate from sibling tools like 'click' or 'get_text' which also involve browser interaction, so it doesn't reach the highest score.

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 like 'click' or 'type', nor does it mention any prerequisites or context for navigation. It simply states what the tool does without indicating appropriate usage scenarios.

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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