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neuron_screenshot

Capture a PNG screenshot of the visible tab area in a foreground Chrome tab by providing its tab ID, enabling visual inspection of the current page.

Instructions

Capture a PNG screenshot of the visible tab area

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
tabIdYesChrome tab ID (must be in foreground)

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. First observedv0.4.1

TDQS

A3.6/5.0
Behavior3/5

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

With no annotations, the description carries the burden of behavioral disclosure. It does clarify that the output is a PNG and limited to the visible tab area, but it does not mention how the screenshot is returned, whether it waits for rendering, or any side effects. This is adequate for a simple capture but not rich.

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, efficient sentence with no filler. The format and scope are front-loaded, and every word adds value.

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?

For a simple one-parameter tool with no output schema, the description provides enough for an agent to understand what it does and what it produces. The main gap is the lack of usage guidance, but the low complexity and complete parameter schema keep it reasonably whole.

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 100%, so the schema already fully documents the tabId parameter. The description does not add meaning beyond the schema, which matches the baseline of 3.

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 states a specific verb ('Capture'), a specific resource ('PNG screenshot'), and a precise scope ('visible tab area'). This clearly distinguishes it from sibling tools like neuron_query_dom or neuron_grab_media without needing to reference them.

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 is given about when to choose this tool over alternative capture or inspection tools. The only constraint, 'must be in foreground', is a prerequisite in the parameter description, not usage guidance about alternatives or exclusions.

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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