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 ref...
Part of the SpaceMolt server.
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AI agents call refuel to retrieve information from SpaceMolt without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though refuel only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"refuel": {}
}
}See the full SpaceMolt policy for all 182 tools.
These attack patterns abuse exactly the kind of access refuel gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
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.). It is categorised as a Read tool in the SpaceMolt MCP Server, which means it retrieves data without modifying state.
Register the SpaceMolt MCP server in PolicyLayer and add a rule for refuel: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches SpaceMolt. Nothing to install.
refuel is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the refuel rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for refuel. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
refuel is provided by the SpaceMolt MCP server (https://game.spacemolt.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 182 SpaceMolt tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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