pfsense_list_system_tunables

A read tool on the Pfsense MCP server.

SERVERPfsense SOURCEabl030/pfsense-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/abl030-pfsense-mcp/pfsense-list-system-tunables.md

WHAT IT DOES

What pfsense_list_system_tunables does on Pfsense

AI agents call pfsense_list_system_tunables to retrieve information from Pfsense without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why pfsense_list_system_tunables is rated Low

This tool retrieves system tunable settings from the pfSense firewall. 'List' operations are retrieval-only with no side effects. While the tool description is empty which reduces confidence slightly, the verb 'list' and the suffix 'system_tunables' (a configuration view operation) clearly indicate a read-only query.

From the tool's definition Tool name contains 'list_system_tunables' indicating a retrieval operation that queries system tunable parameters from pfSense without modification. The 'list' verb is explicitly a Read operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pfsense_list_system_tunables safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Pfsense, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For pfsense_list_system_tunables, this is the rule to start with:

pfsense_list_system_tunables Allowed

pfsense_list_system_tunables is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Pfsense, apply this rule, and every pfsense_list_system_tunables call is checked against it from then on.

FAQ

Questions about pfsense_list_system_tunables

What does the pfsense_list_system_tunables tool do? +

pfsense_list_system_tunables is a read tool on the Pfsense MCP server. It is categorised as a Read tool in the Pfsense MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on pfsense_list_system_tunables? +

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

What risk level is pfsense_list_system_tunables? +

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

Can I rate-limit pfsense_list_system_tunables? +

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

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

pfsense_list_system_tunables is provided by the Pfsense MCP server (abl030/pfsense-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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