browser-mcp

browser_goto

Navigates the current browser tab to a specified URL and returns the navigation result. Use it to load pages for automated UI extraction, screenshots, or network interception.

Instructions

Navigate the current tab to url. Returns the navigation result.

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_goto"
  }
}

Input Schema

Name	Required	Description	Default
`url`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

First observedv0.1.0Sep 18, 2026

TDQS

B3.3/5.0

Behavior2/5

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

With no annotations, the description carries the full burden of behavioral disclosure. It mentions 'Returns the navigation result' but provides no details on whether it waits for page load, error handling, or side effects like history updates. The tool mutates state (navigation), yet the description gives no safety or blocking information. This is a significant gap for a mutation tool.

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, front-loaded sentence with no filler. It states the action and the return value efficiently. Every word earns its place.

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 (simple navigation) and lack of annotations and output schema, the description is inadequate. It omits critical details like whether navigation blocks until page load, what the 'navigation result' contains, and how errors are surfaced. The existence of sibling browser_wait_for_load suggests this tool may not wait, but that's not clarified. An agent would need more context to use it reliably.

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

Parameters2/5

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

Schema description coverage is 0%, so the description must compensate. It says 'Navigate the current tab to `url`', which adds that the parameter is the destination. However, this is essentially restating the parameter name and adds no format, constraints, or examples. The description barely adds meaning beyond the parameter name itself.

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 action ('Navigate') on a specific resource ('current tab') and specifies the target as 'url'. This distinguishes it from siblings like browser_new_tab (which opens a new tab) and browser_switch_tab (which changes focus). No ambiguity.

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

Usage Guidelines3/5

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

The description implies usage for navigating the current tab to a URL, but does not explicitly state when to prefer it over alternatives (e.g., browser_new_tab, browser_switch_tab). There is no exclusion or guidance on when not to use it, leaving the agent to infer based on the name and siblings.

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