AI agents call get_object_fields to retrieve information from Openstudio without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool appears to perform a read-only query to retrieve object field metadata or properties from an OpenStudio model. Given the sibling tools that create, add, and modify model components, this tool's 'get_' prefix strongly indicates data retrieval with no side effects. The empty description slightly lowers confidence, but the semantic meaning of 'get_object_fields' is sufficiently clear to classify as Read.
From the tool's definition The tool name 'get_object_fields' indicates a retrieval operation that fetches field information from objects within the OpenStudio model.
Documented attack patterns abuse exactly the kind of access get_object_fields gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Openstudio, and nothing reaches the server without passing your rules. This is the rule we recommend for get_object_fields:
{
"version": "1",
"default": "deny",
"tools": {
"get_object_fields": {}
}
}get_object_fields is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_object_fields. It is categorised as a Read tool in the Openstudio MCP Server, which means it retrieves data without modifying state.
Register the Openstudio MCP server in PolicyLayer and add a rule for get_object_fields: 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. Nothing to install.
get_object_fields 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 get_object_fields 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 get_object_fields. 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.
get_object_fields is provided by the Openstudio MCP server (natlabrockies/openstudio-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Openstudio, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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146 Openstudio tools catalogued and risk-classified — across an index of 43,000+ MCP servers.