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Zach-Houston

retroachievements-mcp

by Zach-Houston

Get game metadata

ra_game

Fetch core metadata for a game by its ID including title, console, developer, publisher, genre, release date, and box art.

Instructions

Basic metadata for a game by ID: title, console, developer, publisher, genre, release date, box art.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
gameIdYesRetroAchievements game ID
Behavior2/5

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

No annotations are provided, and the description does not disclose behavioral traits such as authentication, rate limits, error handling, or behavior for invalid game IDs. For a simple lookup, some context is missing.

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?

One concise sentence listing key fields. No redundant information, but could be improved with structured formatting.

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?

For a simple tool with one parameter and no output schema, the description is adequate but lacks details on response format or error conditions. Slightly incomplete.

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% for the single parameter 'gameId'. The description adds no extra meaning beyond what the schema already provides (ID). 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 clearly states it retrieves basic metadata for a game by ID, listing specific fields (title, console, etc.). It distinguishes from the sibling tool 'ra_game_extended' by implying it's basic vs extended info.

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 this tool versus alternatives like 'ra_game_extended'. No when-not-to-use or prerequisites mentioned.

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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