AI agents call list_thermal_zones to retrieve information from OpenStudio 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 or enumerates thermal zones from a loaded model without executing code, modifying data, or creating side effects. Listing thermal zones is a querying operation with no irreversible impact. Confidence is slightly reduced to 0.85 due to the empty description, but the name and context strongly indicate read-only behavior.
From the tool's definition The tool name 'list_thermal_zones' indicates a retrieval operation that queries and returns thermal zone data from an OpenStudio building model.
Documented attack patterns abuse exactly the kind of access list_thermal_zones gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and OpenStudio MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_thermal_zones:
{
"version": "1",
"default": "deny",
"tools": {
"list_thermal_zones": {}
}
}list_thermal_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_thermal_zones. It is categorised as a Read tool in the OpenStudio MCP Server MCP Server, which means it retrieves data without modifying state.
Register the OpenStudio MCP Server MCP server in PolicyLayer and add a rule for list_thermal_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 OpenStudio MCP Server. Nothing to install.
list_thermal_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_thermal_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_thermal_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_thermal_zones is provided by the OpenStudio MCP Server MCP server (roruizf/openstudio-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from OpenStudio 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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20 OpenStudio MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.