real-browser-mcp

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browser_navigate

Navigate to any URL in your active browser tab using the real-browser-mcp server. Control your browser with existing sessions and cookies for automated testing or web interaction tasks.

Instructions

Navigate to a URL in the active browser tab

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "url": "<url>"
    },
    "name": "browser_navigate"
  }
}

Input Schema

Name	Required	Description	Default
`url`	Yes	The URL to navigate to
`waitUntil`	No	When to consider navigation complete	load

Schema Changelog

Changes observed during successful MCP inspections.

First observedv1.2.0Mar 10, 2026

TDQS

B3.2/5.0

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. It states the action but doesn't cover critical aspects like whether navigation blocks until completion, error handling for invalid URLs, side effects on page state, or performance implications. For a mutation tool with zero annotation coverage, this is a significant gap.

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 with zero wasted words. It's front-loaded with the core action and context, making it easy to parse quickly. Every word earns its place without being overly verbose or under-specified.

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 the tool's complexity (navigation is a mutation with potential side effects), lack of annotations, and no output schema, the description is incomplete. It doesn't explain what happens on success/failure, return values, or behavioral constraints like rate limits or permissions. For a browser interaction tool, this leaves critical gaps.

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?

Schema description coverage is 100%, so the schema already documents both parameters (url and waitUntil) thoroughly. The description doesn't add any parameter-specific details beyond what the schema provides, such as URL format examples or waitUntil behavior nuances. Baseline 3 is appropriate when the schema does the heavy lifting.

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

Purpose5/5

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

The description clearly states the specific action ('Navigate to a URL') and resource ('in the active browser tab'), distinguishing it from sibling tools like browser_click or browser_type which perform different browser interactions. It precisely communicates what the tool does without being vague or tautological.

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. It doesn't mention prerequisites (e.g., needing an active browser tab), exclusions, or compare it to sibling tools like browser_tabs for tab management. Usage is implied but not explicitly stated.

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