pfsense_list_system_crls
A read tool on the Pfsense MCP server.
This record as markdown: /tools/abl030-pfsense-mcp/pfsense-list-system-crls.md
What pfsense_list_system_crls does on Pfsense
AI agents call pfsense_list_system_crls 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.
Why pfsense_list_system_crls is rated Low
Despite the empty description, the 'list' prefix indicates a read operation that retrieves certificate revocation list data. However, the medium severity reflects that in the context of a firewall management server with 677 tools granting broad control, even read access to security-sensitive information like CRLs could be misused by a compromised agent to gather security posture details, though the actual impact is…
From the tool's definition Tool name 'pfsense_list_system_crls' contains 'list' (a retrieval operation), and CRLs (Certificate Revocation Lists) are informational security artifacts that can be queried without side effects.
Attacks that exploit this kind of access
The rule that runs pfsense_list_system_crls 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_crls, this is the rule to start with:
pfsense_list_system_crls is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Pfsense, apply this rule, and every pfsense_list_system_crls call is checked against it from then on.
Questions about pfsense_list_system_crls
pfsense_list_system_crls 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.
Register the Pfsense MCP server in PolicyLayer and add a rule for pfsense_list_system_crls: 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_system_crls 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_system_crls 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_system_crls. 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_system_crls 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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