AI agents call list_zones 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 retrieves and queries zone data from a HomeyPro home automation system. It performs a simple list/fetch operation with pagination support, returning existing data without creating, modifying, deleting, or executing any actions. This is a classic Read category operation with low severity since misuse would only expose zone information without triggering physical device actions or side effects.
From the tool's definition Tool name 'list_zones' and description 'List all zones with pagination support' indicate a retrieval operation with no modification or execution capabilities.
Documented attack patterns abuse exactly the kind of access list_zones 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 list_zones:
{
"version": "1",
"default": "deny",
"tools": {
"list_zones": {}
}
}list_zones 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 zones with pagination support. 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 list_zones: 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.
list_zones 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 list_zones 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 list_zones. 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.
list_zones 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.