AI agents call ids_list_rule_sets to retrieve information from OPNSense MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists intrusion detection system rule sets without modifying, executing, or deleting any data. It is a simple enumeration/query operation typical of Read category tools. The low severity reflects minimal blast radius—an AI agent listing rule sets cannot cause harm through this action alone.
From the tool's definition Tool name 'ids_list_rule_sets' and description 'List available rule sets' indicate a read-only query operation with no side effects.
Documented attack patterns abuse exactly the kind of access ids_list_rule_sets gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and OPNSense MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for ids_list_rule_sets:
{
"version": "1",
"default": "deny",
"tools": {
"ids_list_rule_sets": {}
}
}ids_list_rule_sets is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List available rule sets. It is categorised as a Read tool in the OPNSense MCP Server MCP Server, which means it retrieves data without modifying state.
Register the OPNSense MCP Server MCP server in PolicyLayer and add a rule for ids_list_rule_sets: 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 OPNSense MCP Server. Nothing to install.
ids_list_rule_sets 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 ids_list_rule_sets 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 ids_list_rule_sets. 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.
ids_list_rule_sets is provided by the OPNSense MCP Server MCP server (vespo92/opnsensemcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 196 OPNSense MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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196 OPNSense MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.