List all possible device clasess, usefull for getting know what to look for
AI agents call get_devices_classes to retrieve information from HomeyPro MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns a static list of device class definitions from the HomeyPro system. It performs no writes, deletions, code execution, or financial operations. The blast radius of misuse is minimal—an adversary gains only informational knowledge about device taxonomy, which does not enable direct control or harm without additional tools like 'control_device'. Classification as Read is appropriate.
From the tool's definition Tool name 'get_devices_classes' and description 'List all possible device classes' indicate a retrieval operation with no modification or side effects.
Documented attack patterns abuse exactly the kind of access get_devices_classes gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and HomeyPro MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_devices_classes:
{
"version": "1",
"default": "deny",
"tools": {
"get_devices_classes": {}
}
}get_devices_classes is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all possible device clasess, usefull for getting know what to look for. It is categorised as a Read tool in the HomeyPro MCP Server MCP Server, which means it retrieves data without modifying state.
Register the HomeyPro MCP Server MCP server in PolicyLayer and add a rule for get_devices_classes: 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 HomeyPro MCP Server. Nothing to install.
get_devices_classes 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 get_devices_classes 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 get_devices_classes. 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.
get_devices_classes is provided by the HomeyPro MCP Server MCP server (pigmej/python-homey-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from HomeyPro MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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19 HomeyPro MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.