list_homes

THE RISK

Low Risk

Why list_homes needs a policy

This tool retrieves information about homes and rooms from the Xiaomi smart home system. It performs a read-only operation with no capability to modify, delete, or execute actions on devices or data. The blast radius of misuse is minimal—an AI agent could enumerate the user's smart home structure, which is low-severity information disclosure at worst.

From the tool's definition Tool name 'list_homes' and description 'List all homes and rooms in a user-friendly structure' indicate a query operation that retrieves and displays existing data without modification or side effects.

Documented attack patterns abuse exactly the kind of access list_homes gives an agent:

POLICY

How to control list_homes

PolicyLayer is an MCP gateway — it sits between your AI agents and 米家 MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_homes:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_homes": {}
  }
}

list_homes is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register 米家 MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

More 米家 MCP Server tools

Destructive clear_saved_login Clear saved login credentials so the next connection triggers QR login. Execute execute_scene Execute a scene by friendly name or scene id. Execute control_by_intent Route a natural-language-like smart-home request to the best product tool. Execute control_device Control a device through capability operations like turn_on, set_brightness, set_target_te Execute reconnect_service Reconnect to Mijia cloud, optionally clearing saved login first. Execute turn_off_device Turn off a device. Execute turn_on_device Turn on a device. Execute set_cover_position Set position for any cover-capable device such as a curtain or blind.

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about list_homes

What does the list_homes tool do? +

List all homes and rooms in a user-friendly structure. It is categorised as a Read tool in the 米家 MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_homes? +

Register the 米家 MCP Server MCP server in PolicyLayer and add a rule for list_homes: 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 米家 MCP Server. Nothing to install.

What risk level is list_homes? +

list_homes is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_homes? +

Yes. Add a rate_limit block to the list_homes 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.

How do I block list_homes completely? +

Set action: deny in the PolicyLayer policy for list_homes. 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.

What MCP server provides list_homes? +

list_homes is provided by the 米家 MCP Server MCP server (javen-yan/miot-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every 米家 MCP Server tool call.

Start from 米家 MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →