AI agents call pfsense_list_services_dns_resolver_domain_overrides to retrieve information from Pfsense without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries DNS resolver domain override configurations from pfSense. It retrieves information about DNS settings without modifying them, making it a Read operation. Severity is medium rather than low because DNS configuration details could inform network reconnaissance or help an attacker understand security controls, though the direct blast radius is limited to information disclosure.
From the tool's definition Tool name contains 'list' which retrieves data (dns resolver domain overrides) with no modification capability. Description is empty but the naming pattern is consistent with other read operations on this server.
Attacks that exploit this kind of access
pfsense_list_services_dns_resolver_domain_overrides. It is categorised as a Read tool in the Pfsense MCP Server, which means it retrieves data without modifying state.
Register the Pfsense MCP server in PolicyLayer and add a rule for pfsense_list_services_dns_resolver_domain_overrides: 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.
pfsense_list_services_dns_resolver_domain_overrides 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 pfsense_list_services_dns_resolver_domain_overrides 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 pfsense_list_services_dns_resolver_domain_overrides. 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.
pfsense_list_services_dns_resolver_domain_overrides 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.
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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