AI agents call domain_summary_tool to retrieve information from Hass-MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Although the description is empty (lowering confidence), the tool name and its position among sibling Read tools (get_entity, get_history, get_statistics) strongly suggest it queries/retrieves domain summary information from Home Assistant. No language indicating modification, deletion, or execution of code is present. This fits the Read category: retrieves or queries data with no side effects.
From the tool's definition Tool name 'domain_summary_tool' suggests querying/summarizing information about Home Assistant domains. Sibling tools on this server include get_entities_by_area, get_entity, get_history, get_statistics—all Read operations.
Documented attack patterns abuse exactly the kind of access domain_summary_tool gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Hass-MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for domain_summary_tool:
{
"version": "1",
"default": "deny",
"tools": {
"domain_summary_tool": {}
}
}domain_summary_tool is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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domain_summary_tool. It is categorised as a Read tool in the Hass-MCP MCP Server, which means it retrieves data without modifying state.
Register the Hass- MCP server in PolicyLayer and add a rule for domain_summary_tool: 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 Hass-MCP. Nothing to install.
domain_summary_tool 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 domain_summary_tool 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 domain_summary_tool. 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.
domain_summary_tool is provided by the Hass- MCP server (voska/hass-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 16 Hass-MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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16 Hass-MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.