prove · FOL Prover MCP Server MCP: Risk & Policy

WHAT IT DOES

What prove does on FOL Prover MCP Server

AI agents invoke prove to trigger actions in FOL Prover MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why prove needs a policy

This tool triggers execution of theorem-proving engines based on supplied logic formulas and premises. While the effects are strictly computational (producing proof results or failure reports) with no data modification, deletion, or financial impact, it does execute external programs whose behavior depends on user-supplied arguments (the formulas and premises).

From the tool's definition Tool description states 'Execute a FOL proof' and 'Attempts to prove the conclusion from the given premises using the specified theorem prover (vampire, eprover, or prover9)'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

prove Rate-limited

prove stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "prove": {
      "limits": [
        {
          "counter": "prove_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about prove

What does the prove tool do? +

Execute a FOL proof. Attempts to prove the conclusion from the given premises using the specified theorem prover (vampire, eprover, or prover9). It is categorised as a Execute tool in the FOL Prover MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on prove? +

Register the FOL Prover MCP Server MCP server in PolicyLayer and add a rule for prove: 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 FOL Prover MCP Server. Nothing to install.

What risk level is prove? +

prove is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit prove? +

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

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

prove is provided by the FOL Prover MCP Server MCP server (newjerseystyle/folprover-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.