backup_configs · Nornir MCP: Risk & Policy

WHAT IT DOES

What backup_configs does on Nornir

AI agents use backup_configs to create or update resources in Nornir — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Nornir environment.

WHY IT NEEDS A POLICY

Why backup_configs needs a policy

The description is empty, so classification relies solely on the tool name and server context. 'backup_configs' most likely reads device configurations and writes them to a backup store — a Write operation. However, it could also overwrite existing backups (partially Destructive) or simply read configs (Read).

From the tool's definition Tool name 'backup_configs' and server context involving network infrastructure configuration management via Nornir/NAPALM/Netmiko.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

backup_configs Rate-limited

backup_configs stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "backup_configs": {
      "limits": [
        {
          "counter": "backup_configs_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Nornir, so you can run agents against it safely.

FAQ

Questions about backup_configs

What does the backup_configs tool do? +

backup_configs. It is categorised as a Write tool in the Nornir MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on backup_configs? +

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

What risk level is backup_configs? +

backup_configs is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit backup_configs? +

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

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

backup_configs is provided by the Nornir MCP server (sydasif/nornir-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.