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Multiplayer Agent

by com.multiplayeragent
OverviewDiscussionsAdmin

List starter games

list_starters
Read-only

List the starter games: ready-made multiplayer games (many built in Multiplayer Agent's videos) to begin from with remix_game. Each shows its slug, title, summary, the video it came from, whether it's premium, and whether THIS studio has it unlocked (free starters: everyone; premium: a paid plan).

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "list_starters"
  }
}

Input Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Added

TDQS

A4.4/5.0
Behavior4/5

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

Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered. The description adds real context beyond them: the returned fields (slug, title, summary, source video, premium flag), and crucially that the unlock column is studio-scoped ('whether THIS studio has it unlocked'), which an agent needs to interpret results per tenant.

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 dense sentence that front-loads the verb and resource, then the payoff fields. The parenthetical about free vs. premium unlocking is slightly heavy but earns its place by explaining the premium/unlock column semantics.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema, the description takes on the job of enumerating returned fields, and it does so completely: slug, title, summary, source video, premium flag, and per-studio unlock status. Combined with the readOnly annotation, an agent has everything needed to call and interpret this tool.

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?

The tool takes zero parameters, so there is no schema semantics to compensate for; baseline 4 applies. The description wastes no words on parameters and instead spends its budget on output content.

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?

States a specific verb ('List') and resource ('starter games'), then defines what a starter game is: 'ready-made multiplayer games... to begin from with remix_game.' This clearly separates it from list_games (all games) and remix_game (the action that consumes a starter).

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

Usage Guidelines4/5

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

The phrase 'to begin from with remix_game' establishes the workflow context: enumerate starters first, then remix one. There is no explicit when-not guidance or named alternative, but the use case is unambiguous for any agent in this sibling set.

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

All Multiplayer Agent toolsInspect
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