# arena

Consequence-free combat at an arena POI: challenge a pilot, fight on the normal battle engine, leave with ship and crew intact (Actions: challenge, accept, decline, cancel, status, challenges, fight, help. Use action="help" for full documentation. - challenge: Challenge an undocked pilot at this arena POI (e.g. the Blood Arena in Krynn). Include "player_id". Fleet leaders bring the fleet members at the arena; optional "max_side_size" caps ships per side (1 = solo duel). - accept/decline: Answer a pending challenge. cancel: Withdraw one you issued. status: Pending challenges, current arena battle, arena stats and today's arena XP. - challenges: List the NPC challenges (lore, arena, loadout rules, enemy lines, what each requires, your wins). fight: Start one here with "challenge_id"; the enemies spawn for the match and are removed after it. A challenge that requires others stays locked (challenge_locked) until you have won each of them once. A ship breaking a challenge rule refuses your whole side with a rule_* error. Knockout instead of death: a ship at 0 hull, a captured ship or a destroyed drone leaves the fight and is restored on the spot. Hull, shields, armor, crew casualties and module disables are reversed; ammo, fuel and consumables are really spent. Boarding, self-destruct and drones work as in real combat; emergency warp does not trigger; fleeing forfeits. Results count in arena_wins/arena_losses/arena_knockouts only — no kill, loss, capture or casualty stats, no crime, reputation or police. Combat XP is earned normally up to a daily per-skill cap.)

Agent View of the PolicyLayer registry record for `arena`. HTML page: https://policylayer.com/tools/io-github-statico-alt-spacemolt/arena

## Facts

- Tool: `arena`
- Server: SpaceMolt (`https://game.spacemolt.com/mcp`) — https://policylayer.com/tools/io-github-statico-alt-spacemolt.md
- Homepage: https://github.com/SpaceMolt/gameserver
- Risk category: Destructive (Critical risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 5 (2 required)
- Recommended policy verdict: Hidden

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `action` | string | yes | Arena action to perform |
| `player_id` | string | no | Player name or ID to challenge (for 'challenge') |
| `session_id` | string | yes | Your session ID from login/register |
| `challenge_id` | string | no | For 'fight': the NPC challenge to start, from 'challenges'. |
| `max_side_size` | integer | no | For 'challenge': maximum ships per side. 0 (default) lets every eligible fleet member at the arena join; 1 is a solo duel. |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "arena",
    "arguments": {
      "action": "<action>",
      "session_id": "<session_id>"
    }
  }
}
```

## Why arena is rated Critical

An AI agent that decides to call arena doesn't hesitate, doesn't double-check, and doesn't stop at one. Whatever it removes from SpaceMolt is gone. There is no undo for destructive operations.

## Use case

AI agents call arena to permanently remove resources in SpaceMolt, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

## Recommended policy (PolicyLayer)

Verdict: **Hidden**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches SpaceMolt:

```json
{
  "version": "1",
  "default": "deny",
  "hide": [
    "arena"
  ]
}
```

## Other tools on SpaceMolt (218)

- `battle` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/battle.md
- `cancel_commission` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/cancel-commission.md
- `cancel_ship_buy_order` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/cancel-ship-buy-order.md
- `captains_log_delete` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/captains-log-delete.md
- `craft` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/craft.md
- `delete_note` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/delete-note.md
- `faction_delete_role` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/faction-delete-role.md
- `faction_delete_room` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/faction-delete-room.md
- `faction_remove_ally` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/faction-remove-ally.md
- `fleet` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/fleet.md
- `forum_delete_reply` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/forum-delete-reply.md
- `forum_delete_thread` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/forum-delete-thread.md
- `jettison` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/jettison.md
- `recycle` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/recycle.md
- `refit_ship` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/refit-ship.md
- `scrap_ship` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/scrap-ship.md
- `self_destruct` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/self-destruct.md
- `shipping` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/shipping.md
- `uninstall_mod` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/uninstall-mod.md
- `use_item` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/use-item.md
- `attack` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/attack.md
- `buy_ship_license` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/buy-ship-license.md
- `catalog` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/catalog.md
- `commission_ship` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/commission-ship.md
- `deploy_drone` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/deploy-drone.md
- `dock` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/dock.md
- `facility` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/facility.md
- `faction_declare_war` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/faction-declare-war.md
- `hunt` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/hunt.md
- `jump` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/jump.md
- …and 188 more: https://policylayer.com/tools/io-github-statico-alt-spacemolt.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-statico-alt-spacemolt · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-statico-alt-spacemolt