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browser-mcp-cdp

browser-mcp-cdp

by zhiqi-li
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Local

browser_scroll

Scroll a webpage by a specified number of pixels horizontally and vertically to navigate content within a browser session.

Instructions

Scroll the page by a relative offset in pixels.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "browser_scroll"
  }
}

Input Schema

NameRequiredDescriptionDefault
xNoHorizontal scroll in px (default 0)
yNoVertical scroll in px (default 0)

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.2

TDQS

B3.3/5.0
Behavior2/5

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

No annotations provided, so description carries full burden. It states 'relative offset in pixels' but lacks details on smooth scrolling, page boundary behavior, or side effects.

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?

Single sentence with no wasted words. Efficiently conveys the core action.

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

Completeness3/5

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

Minimal description for a simple action. Lacks mention of return value or behavior at scroll limits, but sufficient for basic 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?

Schema coverage is 100%, so baseline 3. Description adds no extra meaning beyond schema; 'in pixels' and 'relative offset' are already implied.

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?

Clearly states the action (scroll), the resource (page), and the mechanism (relative offset in pixels). It distinguishes from sibling tools like browser_navigate and browser_click.

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 on when to use scroll vs other tools like browser_click or browser_wait_for. No alternatives or prerequisites mentioned.

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

Deploy Server

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