Fulfill_Contract · SpaceTraders MCP Server MCP

WHAT IT DOES

What Fulfill_Contract does on SpaceTraders MCP Server

AI agents use Fulfill_Contract to create or update resources in SpaceTraders MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your SpaceTraders MCP Server environment.

WHY IT NEEDS A POLICY

Why Fulfill_Contract needs a policy

Based on the tool name and context of the SpaceTraders API (managing contracts), fulfilling a contract likely completes/closes a contract, which is a write/state-change operation. It is probably irreversible but not destructive in the data-loss sense. Confidence is lowered due to the empty description.

From the tool's definition Tool name 'Fulfill_Contract'; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

Fulfill_Contract Rate-limited

Fulfill_Contract stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "Fulfill_Contract": {
      "limits": [
        {
          "counter": "fulfill_contract_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches SpaceTraders MCP Server, so you can run agents against it safely.

FAQ

Questions about Fulfill_Contract

What does the Fulfill_Contract tool do? +

Fulfill_Contract. It is categorised as a Write tool in the SpaceTraders MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on Fulfill_Contract? +

Register the SpaceTraders MCP Server MCP server in PolicyLayer and add a rule for Fulfill_Contract: 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 SpaceTraders MCP Server. Nothing to install.

What risk level is Fulfill_Contract? +

Fulfill_Contract is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit Fulfill_Contract? +

Yes. Add a rate_limit block to the Fulfill_Contract 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.

How do I block Fulfill_Contract completely? +

Set action: deny in the PolicyLayer policy for Fulfill_Contract. 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.

What MCP server provides Fulfill_Contract? +

Fulfill_Contract is provided by the SpaceTraders MCP Server MCP server (thevalverde/spacetraders-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.