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user_start

Start a new Minesweeper game for a specific user by providing their unique slug identifier to initialize gameplay.

Instructions

Start a new game for a user slug.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
user_slugNo

Implementation Reference

  • Tool definition for "user_start" in src/tools/handlers.ts.
    {
      name: "user_start",
      description: "Start a new game for a user slug.",
      inputSchema: {
        type: "object",
        properties: {
          user_slug: { type: "string" },
        },
      },
    },
  • Handler implementation for "user_start" in src/tools/handlers.ts.
    async (input) => {
      const userSlug = requireStringOrEnv(
        (input as { user_slug?: unknown })?.user_slug,
        "user_slug",
        process.env.MINESWEEPER_USER_SLUG,
        "MINESWEEPER_USER_SLUG"
      );
      return rails.startGame(userSlug);
    }
Behavior2/5

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

No annotations provided, yet the description fails to disclose mutation behavior details: what 'starting' creates (game ID? session?), side effects, idempotency, or return values. Agent cannot infer safety profile or state changes.

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?

Extremely concise at 8 words/1 sentence. Front-loaded with verb and object, though brevity becomes a liability given the lack of structured metadata (annotations/schema descriptions) that would compensate.

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

Completeness2/5

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

Insufficient for a lifecycle tool (creates/initializes) with no output schema. Omits return structure, relationship to game_end/game_state siblings, and whether the started game becomes immediately playable or requires additional setup via game_chord/game_open.

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

Parameters2/5

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

With 0% schema description coverage, the description must compensate but only mentions 'user slug' without explaining what a slug is (format, constraints, source), valid values, or whether it refers to an existing user record versus a display name.

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

Purpose3/5

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

States the core action (Start) and resource (new game) but uses awkward phrasing ('for a user slug'). Does not distinguish from sibling tools like game_open or clarify if this initializes the game lifecycle vs other entry points.

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?

Provides no guidance on when to use this tool versus alternatives (game_open), prerequisites for the user_slug parameter, or when the operation might fail (e.g., if a game is already active).

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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