list_measure_arguments

THE RISK

Low Risk

Why list_measure_arguments needs a policy

This tool retrieves and queries information about measure argument properties (names, types, defaults, choices). It has no side effects, does not modify data, does not execute simulations or code, and does not delete or create resources. It is purely informational, making it a Read category tool with low severity.

From the tool's definition Tool name 'list_measure_arguments' and description 'List argument names, types, defaults, and choices for an OpenStudio measure' indicates retrieval of metadata about measure configurations without modification or execution.

Documented attack patterns abuse exactly the kind of access list_measure_arguments gives an agent:

POLICY

How to control list_measure_arguments

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 list_measure_arguments:

policy.json

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

list_measure_arguments is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Openstudio — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about list_measure_arguments

What does the list_measure_arguments tool do? +

List argument names, types, defaults, and choices for an OpenStudio measure. It is categorised as a Read tool in the Openstudio MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_measure_arguments? +

Register the Openstudio MCP server in PolicyLayer and add a rule for list_measure_arguments: 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.

What risk level is list_measure_arguments? +

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

Can I rate-limit list_measure_arguments? +

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

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

list_measure_arguments 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.

Enforce policy on every Openstudio tool call.

Start from Openstudio, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →