v0.2.0 · live
CAPFRAME
← leaderboard/SpaceMolt/tool · refuel
§ toolhttpSpaceMolt

refuel

on https://game.spacemolt.com/mcp

Severity

critical0
high1
medium2
low0
info0

3 findings on this tool

  1. highexcessive agencyf-r4-refuel

    Tool `refuel` accepts an unbounded monetary / quota value

    The numeric parameter(s) `quantity` have a money/quota-shaped name but no `maximum` constraint. An LLM tricked by indirect-injection can call the tool with arbitrarily large values.

    fix: Add a `maximum` (and ideally `minimum`) to each money/quota numeric, OR enforce the cap via a capframe-bind `--limit` caveat at the agent boundary.

    OWASP LLM08NIST MANAGE-2.2ATLAS T0051CAST-01
  2. mediumunconstrained inputf-r1-refuel

    Tool `refuel` accepts unconstrained string input

    The following string parameter(s) have no `maxLength` constraint: `item_id`, `session_id`, `target`. Unbounded strings let an attacker stuff arbitrary payloads through the tool, including indirect-injection content.

    fix: Add a `maxLength` to each string property, or constrain with an `enum` or `pattern`. Most legitimate tool inputs fit under a few hundred bytes.

    OWASP LLM01NIST MEASURE-2.3ATLAS T0051CAST-03
  3. mediumexcessive agencyf-r5-refuel

    Tool `refuel` description mentions money but no `money` side-effect is declared

    Description: "Refuel your ship or transfer fuel to another ship (Four modes: (1) target=fleet shows fleet fuel status (all members' fuel levels and fuel/jump). (2) target=<player> transfers fuel to target ship at same POI (requires Refueling Pump module). (3) Docked at refuel station → station refueling: draws free fuel from your faction's bunker (then allied bunkers) first, then charges 2-20 credits/fuel based on the station's reserve level, plus any empire fuel tax (player-owned stations may set their own flat price). (4) Otherwise → fuel cells from cargo. Auto-selects cheapest fuel cell unless item_id specified. Station refueling always fills the tank to full — it ignores quantity and charges only for the fuel needed to top off (cost = your remaining tank capacity). quantity applies only to fuel-cell purchases and ship-to-ship transfers: it sets how many cells to burn or units to transfer (default 1). Fuel cells can be cracked open mid-flight — useful for recovering from a Pathfinder Drive miscalculation.)" -- this references money/payment/refund/etc., but the declared side_effects ([]) don't include `money`. A capframe-bind policy that relies on declared side_effects to scope spend caveats will under-scope this tool.

    fix: Add `money` to the tool's `side_effects` declaration, or rewrite the description to clarify that no actual money moves.

    OWASP LLM08NIST MEASURE-2.6ATLAS T0040CAST-01

About this tool

refuel is one of 210 tools exposed by SpaceMolt. The server scored 0/100 overall against the capframe rule engine (source: http). Last scanned 2026-07-20.

The findings above are emitted by the public capframe.findings.v1 schema. Disagree with one? Open an issue.