get_interfaces_counters

THE RISK

Low Risk

Why get_interfaces_counters needs a policy

This tool retrieves operational metrics (RX/TX packet and byte counters) from network interfaces. It performs no data modification, does not execute arbitrary commands, and does not cause side effects. The operation is consistent with other sibling tools on this server (get_arp_table, get_config, get_interfaces) which are all Read category tools that gather network state information via NAPALM drivers.

From the tool's definition Tool name 'get_interfaces_counters' and description 'Retrieve detailed RX/TX counters for all interfaces' indicate a read-only operation that queries network device statistics without modification.

Documented attack patterns abuse exactly the kind of access get_interfaces_counters gives an agent:

POLICY

How to control get_interfaces_counters

PolicyLayer is an MCP gateway — it sits between your AI agents and Nornir MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_interfaces_counters:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_interfaces_counters": {}
  }
}

get_interfaces_counters is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Nornir MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Nornir MCP Server tools

Execute traceroute Execute the traceroute command from the device to the specified destination. Execute send_command Send a validated read-only command or list of commands to the device. Read get_arp_table Get the device's ARP (Address Resolution Protocol) table. Read get_bgp_config Retrieve BGP configuration from the device. Read get_bgp_neighbors Get a summary of BGP (Border Gateway Protocol) neighbors. Read get_bgp_neighbors_detail Obtain a detailed view of all BGP neighbors. Read get_config Use NAPALM to retrieve device configurations (running, startup, or candidate). Read get_facts Retrieve high-level facts and information about the device (e.g., vendor, model, serial nu

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_interfaces_counters

What does the get_interfaces_counters tool do? +

Retrieve detailed RX/TX counters for all interfaces. It is categorised as a Read tool in the Nornir MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_interfaces_counters? +

Register the Nornir MCP Server MCP server in PolicyLayer and add a rule for get_interfaces_counters: 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 Nornir MCP Server. Nothing to install.

What risk level is get_interfaces_counters? +

get_interfaces_counters is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_interfaces_counters? +

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

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

get_interfaces_counters is provided by the Nornir MCP Server MCP server (yhvh-chen/nornir_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Nornir MCP Server tool call.

Start from Nornir MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →