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RealSlimShady2000

Roblox Executor MCP Server

List visible Roblox windows

list-roblox-windows

Identify visible Roblox windows and their process IDs to select the correct window before taking a screenshot.

Instructions

List visible Roblox OS windows with PIDs. Use before screenshot-window when multiple Roblox windows may be open.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior4/5

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

Although no annotations are provided, the description discloses that only 'visible' windows are listed and that PIDs are included, which adds behavioral context beyond the name. However, it could be improved by noting that no parameters are required and that the operation is read-only and non-destructive.

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, front-loaded sentence that immediately states the tool's purpose, followed by a usage hint. Every word is necessary and contributes to clarity without repetition.

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 the tool's simplicity and lack of output schema, the description provides sufficient context: what it does and when to use it. It could be more complete by mentioning that no arguments are needed, but the empty schema already conveys that.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

With zero parameters, the description does not need to add parameter information, and it correctly implies that the tool requires no input. The baseline for 0 parameters is 4, and the description does not conflict with the empty 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 lists visible Roblox OS windows with PIDs, specifying the verb 'list' and the resource 'Roblox OS windows', which distinguishes it from the sibling tool 'screenshot-window' that takes a screenshot of a specific window.

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

Usage Guidelines5/5

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

The description explicitly advises to 'Use before screenshot-window when multiple Roblox windows may be open', providing clear when-to-use guidance and naming an alternative sibling tool, which helps the agent decide which tool to invoke.

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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