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sharkusmanch

RetroAchievements MCP Server

by sharkusmanch

get_game_rankings

Read-only

Fetch a game's top 10 rankings: highest scorers or most recent masters. Provide a game ID and ranking type to view RetroAchievements leaderboard results.

Instructions

A game's top 10: highest scorers, or most recent masters.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
typeNohigh_scores
game_idYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

B3.2/5.0
Behavior3/5

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered. The description adds the useful constraint that the result is exactly a top 10 (bounded size), but says nothing about permissions, ordering guarantees, or pagination/absence of results.

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?

A single compact clause that is front-loaded with the core resource. It is efficient, though the fragmentary phrasing costs a little clarity.

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 two-parameter read tool with no output schema, the description conveys the essential shape of the result (top 10, two ranking modes). It stops short of explaining what 'masters' means or how ties/ordering are handled, but nothing critical to invoking it is missing.

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 0%, so the description must carry parameter meaning. It does gloss the two type values ('highest scorers' = high_scores, 'most recent masters' = latest_masters), but game_id is left entirely unexplained and the gloss is loose rather than matching the enum semantics.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description names the resource (a game's top 10) and the two ranking modes, which lets an agent distinguish it at a high level. However it is a noun fragment with no verb, and it does not clearly separate itself from the sibling get_leaderboards.

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?

There is no explicit when-to-use guidance, no prerequisites, and no mention of the sibling alternatives such as get_leaderboards or get_game. The two modes are only implied by the phrase 'highest scorers, or most recent masters'.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.