AI agents call pfsense_list_services_dns_forwarder_host_override_aliases 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.
The 'list' prefix indicates a query/retrieval operation with no side effects, classifying this as Read. However, the medium severity reflects that DNS forwarder configuration details could be sensitive information useful for reconnaissance or understanding network filtering rules.
From the tool's definition Tool name contains 'list' and 'host_override_aliases' suggesting retrieval of DNS forwarder alias configuration data; no verbs indicating modification, deletion, or execution. Description is empty, limiting certainty.
Attacks that exploit this kind of access
pfsense_list_services_dns_forwarder_host_override_aliases. 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_forwarder_host_override_aliases: 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_forwarder_host_override_aliases 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_forwarder_host_override_aliases 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_forwarder_host_override_aliases. 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_forwarder_host_override_aliases 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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