Get port extension settings (delay and loss compensation)
AI agents call vna_get_port_extension to retrieve information from Copper Mountain Vna without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries existing port extension settings from the VNA device. It is a read-only operation that retrieves current compensation parameters without altering state, executing commands, or creating irreversible changes. The low severity reflects minimal blast radius even if misused by an AI agent — reading settings poses no operational risk.
From the tool's definition Tool name contains 'get' and description states 'Get port extension settings' — retrieves configuration parameters (delay and loss compensation) with no modification or side effects.
Attacks that exploit this kind of access
Get port extension settings (delay and loss compensation). It is categorised as a Read tool in the Copper Mountain Vna MCP Server, which means it retrieves data without modifying state.
Register the Copper Mountain Vna MCP server in PolicyLayer and add a rule for vna_get_port_extension: 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.
vna_get_port_extension is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the vna_get_port_extension 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.
Set action: deny in the PolicyLayer policy for vna_get_port_extension. 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.
vna_get_port_extension 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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