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browser_scroll

Scrolls the page or a specified element into view. Supports direction, pixel amount, and CSS selector for targeted scrolling.

Instructions

Scroll the page or scroll an element into view.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
session_idYesThe session ID
directionNoScroll direction (up, down, left, right, top, bottom)down
amountNoPixels to scroll (for up/down/left/right)
selectorNoElement to scroll into view (optional, overrides direction)
byNoSelector type if selector is providedcss

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

With no annotations provided, the description bears full responsibility for behavioral disclosure. It fails to mention scrolling behavior (e.g., smooth vs instant), side effects, or whether it scrolls the main viewport or a specific element.

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, efficient sentence covering both main use cases. However, it could be slightly expanded to include key behavioral or return info 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?

The description omits return value information, which is not covered by the output schema (if present). It does not explain what 'scroll into view' entails or any prerequisites, leaving gaps for an AI agent.

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% with detailed parameter descriptions. The description adds minimal value by hinting at the selector's role ('scroll an element into view'), but does not provide additional semantics beyond the schema.

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 tool scrolls the page or an element into view, using a specific verb and resource, which distinguishes it from sibling browser tools like navigation or clicks.

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 or when not to use it. No explicit context for usage selection.

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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