refuel
on https://game.spacemolt.com/mcp
Severity
3 findings on this tool
- 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 T0051 - 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 T0051 - 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 with credits → station refueling (1 credit/fuel). (4) Otherwise → fuel cells from cargo. Auto-selects cheapest fuel cell unless item_id specified. quantity sets 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 T0040
About this tool
refuel is one of 179 tools exposed by SpaceMolt. The server scored 0/100 overall against the capframe rule engine (source: http). Last scanned 2026-06-05.
The findings above are emitted by the public capframe.findings.v1 schema. Disagree with one? Open an issue.