Get a list of all Home Assistant entities, with optional filtering by domain
AI agents call tools-entities-list to retrieve information from Home Assistant 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 lists entities from a Home Assistant system. It performs a read-only query operation with optional filtering, returning data about entities without any side effects, modifications, or state changes. This is a straightforward information retrieval function typical of Read category tools.
From the tool's definition Tool name 'tools-entities-list' and description 'Get a list of all Home Assistant entities, with optional filtering by domain' indicate a query/retrieval operation with no modification or execution of commands.
Attacks that exploit this kind of access
Get a list of all Home Assistant entities, with optional filtering by domain. It is categorised as a Read tool in the Home Assistant MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Home Assistant MCP Server MCP server in PolicyLayer and add a rule for tools-entities-list: 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 Home Assistant MCP Server. Nothing to install.
tools-entities-list 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 tools-entities-list 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 tools-entities-list. 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.
tools-entities-list is provided by the Home Assistant MCP Server MCP server (oleander/home-assistant-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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