vna_trigger_sweep · Copper Mountain Vna MCP: Risk & Policy

WHAT IT DOES

What vna_trigger_sweep does on Copper Mountain Vna

AI agents invoke vna_trigger_sweep to trigger actions in Copper Mountain Vna. 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 vna_trigger_sweep needs a policy

This tool executes a command that causes external hardware (VNA) to perform an operation whose effects are observable and depend on the analyzer's current state and configuration. While not destructive or financial, it is an Execute category action because it triggers an external operation and waits for its completion.

From the tool's definition Tool triggers a physical measurement sweep on a Vector Network Analyzer via SCPI protocol. The description 'Trigger single sweep and wait for completion' indicates it commands external hardware to perform a measurement operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vna_trigger_sweep Rate-limited

vna_trigger_sweep 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": {
    "vna_trigger_sweep": {
      "limits": [
        {
          "counter": "vna_trigger_sweep_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 Copper Mountain Vna, so you can run agents against it safely.

FAQ

Questions about vna_trigger_sweep

What does the vna_trigger_sweep tool do? +

Trigger single sweep and wait for completion. It is categorised as a Execute tool in the Copper Mountain Vna MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on vna_trigger_sweep? +

Register the Copper Mountain Vna MCP server in PolicyLayer and add a rule for vna_trigger_sweep: 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 Copper Mountain Vna. Nothing to install.

What risk level is vna_trigger_sweep? +

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

Can I rate-limit vna_trigger_sweep? +

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

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

vna_trigger_sweep is provided by the Copper Mountain Vna MCP server (rfingadam/copper-mountain-vna-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.