unlock_flight_offer · LetsFG MCP: Risk & Policy

WHAT IT DOES

What unlock_flight_offer does on LetsFG

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

WHY IT NEEDS A POLICY

Why unlock_flight_offer needs a policy

An AI agent can call unlock_flight_offer faster than any human can review — one bad instruction and it creates or modifies resources in LetsFG by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

unlock_flight_offer Rate-limited

unlock_flight_offer 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": {
    "unlock_flight_offer": {
      "limits": [
        {
          "counter": "unlock_flight_offer_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 LetsFG, so you can run agents against it safely.

FAQ

Questions about unlock_flight_offer

What does the unlock_flight_offer tool do? +

Confirm live price with the airline and reserve offer for 30 minutes (step 2 of 3).\n\n. It is categorised as a Write tool in the LetsFG MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on unlock_flight_offer? +

Register the LetsFG MCP server in PolicyLayer and add a rule for unlock_flight_offer: 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 LetsFG. Nothing to install.

What risk level is unlock_flight_offer? +

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

Can I rate-limit unlock_flight_offer? +

Yes. Add a rate_limit block to the unlock_flight_offer 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 unlock_flight_offer completely? +

Set action: deny in the PolicyLayer policy for unlock_flight_offer. 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 unlock_flight_offer? +

unlock_flight_offer is provided by the LetsFG MCP server (letsfg/letsfg). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.