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Mochi

Mochi

by DevZonayed
OverviewSchemaSourceRelated ServersDiscussionsAdmin
JavaScript
Local

browser_navigate

Navigate the active tab to a URL and wait for load. Keeps the tab active without stealing focus, with optional window foreground.

Instructions

Navigate the active session tab to a URL and wait for load. The tab is always made active within its Chrome window (prevents SPA throttling), but by default does NOT raise the Chrome window to OS foreground — automation no longer steals keyboard focus from whatever you're working on. Pass bringToFront:true to explicitly bring the window forward (useful when you want to watch).

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

NameRequiredDescriptionDefault
urlYes
tabIdNo
bringToFrontNoRaise the Chrome window to OS foreground (steals keyboard focus). Default false in 0.4.1+ — the tab is always made active within its window regardless.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A4.2/5.0
Behavior4/5

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

No annotations are provided, so the description carries the full burden. It discloses that the tab is made active within the window to prevent SPA throttling, that the window is not raised by default, and that bringToFront steals focus. No contradictions.

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 two sentences, front-loaded with the main action, and every sentence adds value. No wasted words.

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

Completeness4/5

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

Given 3 parameters, no output schema, and numerous sibling tools, the description covers the main behavior, key parameter, and important nuance (focus behavior). It mentions waiting for load. Could be slightly more complete about error handling or return value, but adequate.

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 low (33%). The description adds meaning for bringToFront (explains its effect and default), but does not add details for url or tabId beyond the schema types.

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 verb 'Navigate' and the resource 'URL', and distinguishes from sibling tools like browser_open_tab and browser_go_back/forward through the context of an active session tab.

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

Usage Guidelines4/5

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

The description provides guidance on when to use bringToFront:true (when you want to watch), and clarifies the default behavior (does not steal focus). No explicit alternatives are mentioned, but the context is clear.

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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