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freelw

Puppeteer MCP Server

by freelw

puppeteer_hover

Simulate mouse hover on a webpage element identified by a CSS selector to trigger hover effects.

Instructions

Hover an element on the page

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
selectorYesCSS selector for element to hover
Behavior2/5

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

No annotations are provided, so the description should disclose behavioral traits. It only states the action, not side effects (e.g., triggering hover events) or requirements (e.g., element must be visible). This is insufficient.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single concise sentence with no unnecessary words. It is front-loaded and efficient, though could include slightly more detail without losing conciseness.

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 simplicity (one param, no output schema), the description is too minimal. It lacks context about hover behavior, error handling, or interaction with the page, which is important for an automation tool.

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 input schema has 100% coverage with a clear description for the single parameter 'selector' (CSS selector). The tool description adds no further meaning, but the schema already suffices. Baseline 3 is appropriate.

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 'Hover an element on the page' clearly states the verb (hover) and resource (element on page). It distinguishes from sibling tools like puppeteer_click, puppeteer_fill, etc., which have different actions.

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 usage guidelines are provided. The description does not specify when to use hover vs click or other sibling tools, nor does it mention prerequisites like element visibility.

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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