entities

Return Home Assistant entity registry.

SERVERMcp Control Plane SOURCEalbertik322-sudo/mcp-control-plane

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mcp-control-plane/entities.md

WHAT IT DOES

What entities does on Mcp Control Plane

AI agents call entities to retrieve information from Mcp Control Plane without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why entities is rated Low

This tool performs a read-only query of Home Assistant's entity registry, retrieving configuration and metadata about connected devices and automations. No data is created, modified, deleted, or executed. The blast radius of misuse is limited to information disclosure about the home automation environment.

From the tool's definition Tool is described as 'Return Home Assistant entity registry' — a retrieval operation that queries and returns entity metadata without modifying state.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs entities safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Control Plane, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For entities, this is the rule to start with:

entities Allowed

entities is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Control Plane, apply this rule, and every entities call is checked against it from then on.

FAQ

Questions about entities

What does the entities tool do? +

Return Home Assistant entity registry. It is categorised as a Read tool in the Mcp Control Plane MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on entities? +

Register the Mcp Control Plane MCP server in PolicyLayer and add a rule for entities: 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 Mcp Control Plane. Nothing to install.

What risk level is entities? +

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

Can I rate-limit entities? +

Yes. Add a rate_limit block to the entities 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 entities completely? +

Set action: deny in the PolicyLayer policy for entities. 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 entities? +

entities is provided by the Mcp Control Plane MCP server (albertik322-sudo/mcp-control-plane). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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