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game_chord

Chord a cell in Minesweeper to reveal adjacent safe cells and clear surrounding areas, helping players progress through the game efficiently.

Instructions

Chord a cell in a game.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
public_idYes
xYes
yYes

Implementation Reference

  • The handler function for the game_chord tool which calls rails.chordCell.
    async (input) => {
      const publicId = requireString(
        (input as { public_id?: unknown })?.public_id,
        "public_id"
      );
      const { x, y } = requireCoordinates(input);
      return rails.chordCell(publicId, x, y);
    }
  • Registration of the game_chord tool, including its name, description, and input schema.
    addTool(
      {
        name: "game_chord",
        description: "Chord a cell in a game.",
        inputSchema: {
          type: "object",
          properties: {
            public_id: { type: "string" },
            x: { type: "integer" },
            y: { type: "integer" },
          },
          required: ["public_id", "x", "y"],
        },
      },
Behavior1/5

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

No annotations are provided, so the description carries full disclosure burden. It fails to explain what chording does (reveal adjacent cells), that it requires correct flag counts, or that it can end the game. No behavioral traits disclosed.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The single sentence is appropriately brief, but its extreme minimalism (five words) leaves it empty rather than concise. No structural issues, but every sentence does not earn its place due to lack of substance.

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?

With three undocumented parameters, no annotations, no output schema, and multiple sibling tools, the description should explain game mechanics, prerequisites (e.g., requiring placed flags), and parameter meanings. It provides none of this.

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 coverage, the description must compensate for all three parameters. It implies x/y locate a 'cell' but completely fails to explain 'public_id' or coordinate system conventions (0-indexed vs 1-indexed).

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?

Uses the specific verb 'chord' and mentions the resource 'cell', but 'chord' is unexplained jargon assuming Minesweeper domain knowledge. Distinguishes from siblings by specific terminology, but unclear to agents unfamiliar with the mechanic.

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

Usage Guidelines1/5

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

No guidance provided on when to use this versus game_flag or game_open, no preconditions mentioned (e.g., required game state), and no alternatives suggested. The description states only what the tool does, not when to invoke it.

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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