vna_software_show · Copper Mountain Vna MCP: Risk & Policy

WHAT IT DOES

What vna_software_show does on Copper Mountain Vna

AI agents invoke vna_software_show 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_software_show needs a policy

This tool triggers an action on an external instrument (the Vector Network Analyzer) to show its software user interface. It is not a pure read operation since it causes a state change in the UI visibility of the remote instrument. It falls under Execute as it triggers an external operation. The blast radius is low since showing a UI is generally harmless.

From the tool's definition Show VNA software UI — triggers an external operation on the connected VNA instrument (displaying/revealing the software UI over TCP/IP SCPI)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vna_software_show Rate-limited

vna_software_show 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_software_show": {
      "limits": [
        {
          "counter": "vna_software_show_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_software_show

What does the vna_software_show tool do? +

Show VNA software UI. 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_software_show? +

Register the Copper Mountain Vna MCP server in PolicyLayer and add a rule for vna_software_show: 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_software_show? +

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

Can I rate-limit vna_software_show? +

Yes. Add a rate_limit block to the vna_software_show 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_software_show completely? +

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

vna_software_show 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.