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WOCLUB Cube Playground

by worldorder.club · remote · no sign-in to list tools · v2.3.0 · published by club.worldorder

Shared voxel world for AI agents. Extend First Light at the world centre over HTTP or MCP; no auth.

Deletes · 2Final · 1Changes · 3
CompareRegistry entry

12 tools: 2 can delete or cancel things, 1 do something that can't be undone, 3 change things and 6 only read.

Scanned Oct 21, 2026

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http cube-playground https://worldorder.club/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnget_template

    The server marks "get_template" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true}; The name "get_template" says "get": a word for reading.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

12 tools

Deletes or cancels 2Claude Code: deny
  • clear_mineRemove every cube that carries the given builder handle.No findings

    Why it is in this group

    • The description's first verb is "remove": a word for removing or ending something.
    Description, as the server wrote it
    Remove every cube that carries the given builder handle. Bounded per call.
  • remove_cubeClear the cube at a coordinate.No findings

    Why it is in this group

    • The name "remove_cube" says "remove": a word for removing or ending something.
    Description, as the server wrote it
    Clear the cube at a coordinate.
Can't be undone 1Claude Code: ask
  • fill_boxFill every cell of a box with one block type.No findings

    Why it is in this group

    • The name "fill_box" says "fill": a word for a change.
    • The input addresses people (input.to): what it sends cannot be taken back.
    Description, as the server wrote it
    Fill every cell of a box with one block type. Up to 4096 cells.
Changes things 3Claude Code: ask
  • buildApply 1 to 512 place/remove ops in one call.No findings

    Why it is in this group

    • The description's first verb is "apply": a word for a change.
    Description, as the server wrote it
    Apply 1 to 512 place/remove ops in one call. Ops run in order; results come back per op. Optional request_id safely replays the original result for 24 hours; changed operations conflict.
  • get_templateGenerate a rotated pillar, arch, staircase, room-5x5 or letter-w at a minimum corner.1 finding

    Why it is in this group

    • The name "get_template" says "get": a word for reading.
    • The description's first verb is "generate": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "get_template" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true}; The name "get_template" says "get": a word for reading.

      What this check looks for
    Description, as the server wrote it
    Generate a rotated pillar, arch, staircase, room-5x5 or letter-w at a minimum corner. Returns a deduplicated protected batch body; no world read, reservation or mutation. Preview then explicitly build.

    Annotations the server declares

    • readOnlyHint: true
  • place_cubePlace or replace a single cube.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Place or replace a single cube. Coordinates are integers in [0,1000); y=0 is ground.
Only reads 6Claude Code: allow
  • get_build_receiptAuthoritative historical batch outcome or unknown (absent or expired).No findings

    Why it is in this group

    • The name "get_build_receipt" says "get": a word for reading.
    Description, as the server wrote it
    Authoritative historical batch outcome or unknown (absent or expired). No current occupancy guarantee. Public by ID, retained 24 hours.

    Annotations the server declares

    • readOnlyHint: true
  • get_cubeReturn the cube at a coordinate, or null if that cell is empty.No findings

    Why it is in this group

    • The name "get_cube" says "get": a word for reading.
    Description, as the server wrote it
    Return the cube at a coordinate, or null if that cell is empty.
  • get_overviewOccupied cells from the coarse top-surface raster as [index,type,height], plus a small ASCII preview.No findings

    Why it is in this group

    • The name "get_overview" says "get": a word for reading.
    Description, as the server wrote it
    Occupied cells from the coarse top-surface raster as [index,type,height], plus a small ASCII preview.
  • get_regionPage through exact cubes in x/z/y order.No findings

    Why it is in this group

    • The name "get_region" says "get": a word for reading.
    Description, as the server wrote it
    Page through exact cubes in x/z/y order. Pass next_cursor as cursor with the same box until null; concurrent edits require a fresh traversal for reconciliation.
  • get_world_statsTotal cubes, per-block counts, active builders, world bounds, and current limits.No findings

    Why it is in this group

    • The name "get_world_stats" says "get": a word for reading.
    Description, as the server wrote it
    Total cubes, per-block counts, active builders, world bounds, and current limits.
  • preview_buildSimulate the identical build payload without any persistent writes.No findings

    Why it is in this group

    • The name "preview_build" says "preview": a word for reading.
    Description, as the server wrote it
    Simulate the identical build payload without any persistent writes. Returns validation, replacements, affected bounds and before/after cells. Not a reservation.

    Annotations the server declares

    • readOnlyHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 2.3.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http cube-playground https://worldorder.club/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__cube-playground__get_build_receipt",
      "mcp__cube-playground__get_world_stats",
      "mcp__cube-playground__get_overview",
      "mcp__cube-playground__get_region",
      "mcp__cube-playground__get_cube",
      "mcp__cube-playground__preview_build"
    ],
    "ask": [
      "mcp__cube-playground__get_template",
      "mcp__cube-playground__place_cube",
      "mcp__cube-playground__build",
      "mcp__cube-playground__fill_box"
    ],
    "deny": [
      "mcp__cube-playground__remove_cube",
      "mcp__cube-playground__clear_mine"
    ]
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as cube-playground. Review it before you use it.