Group devices together (e.g., all devices belonging to one person)
AI agents use group_devices to create or update resources in OPNSense MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your OPNSense MCP Server environment.
Grouping devices is a write/configuration action that creates or modifies logical associations. It is reversible (groups can be dissolved) and does not execute code, delete data, or involve financial transactions. Confidence is moderate because the description is sparse and doesn't clarify the exact backend effect on firewall rules or network configuration, but the core action is a data organization write.
From the tool's definition "Group devices together" — creates or modifies a grouping/association of devices
Documented attack patterns abuse exactly the kind of access group_devices 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 group_devices:
{
"version": "1",
"default": "deny",
"tools": {
"group_devices": {
"limits": [
{
"counter": "group_devices_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}group_devices stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Group devices together (e.g., all devices belonging to one person). It is categorised as a Write tool in the OPNSense MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the OPNSense MCP Server MCP server in PolicyLayer and add a rule for group_devices: 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.
group_devices is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the group_devices 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 group_devices. 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.
group_devices 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.