calculate_eur · Petropt/petro MCP: Risk & Policy

WHAT IT DOES

What calculate_eur does on Petropt/petro

AI agents invoke calculate_eur to trigger actions in Petropt/petro. 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 calculate_eur needs a policy

Based on the server context (petroleum engineering tools) and the tool name, this likely performs a numerical calculation (EUR = Estimated Ultimate Recovery) using decline curve or reservoir data. This is an Execute/Read-type operation — it runs a computation but has no obvious write or destructive side effects. Empty description lowers confidence.

From the tool's definition Tool name 'calculate_eur' suggests calculating Estimated Ultimate Recovery (EUR), a petroleum engineering computation. Description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

calculate_eur Rate-limited

calculate_eur 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": {
    "calculate_eur": {
      "limits": [
        {
          "counter": "calculate_eur_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 Petropt/petro, so you can run agents against it safely.

FAQ

Questions about calculate_eur

What does the calculate_eur tool do? +

calculate_eur. It is categorised as a Execute tool in the Petropt/petro MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on calculate_eur? +

Register the Petropt/petro MCP server in PolicyLayer and add a rule for calculate_eur: 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 Petropt/petro. Nothing to install.

What risk level is calculate_eur? +

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

Can I rate-limit calculate_eur? +

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

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

calculate_eur is provided by the Petropt/petro MCP server (petropt/petro-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.