AI agents use create_new_building to create or update resources in Openstudio — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Openstudio environment.
The tool creates a new building model entity, which is a reversible data modification operation. This fits the Write category (creates or modifies data reversibly). Severity is medium because creating a building model in an energy simulation tool could lead to wasted computational resources or misleading analysis if misused by an agent, but the action is reversible and does not delete data or execute arbitrary code.
From the tool's definition Tool name 'create_new_building' indicates creation of a data object within the OpenStudio building energy simulation environment. Server description confirms the system supports 'creation...of models.' No description provided to clarify specific side effects.
Documented attack patterns abuse exactly the kind of access create_new_building 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 create_new_building:
{
"version": "1",
"default": "deny",
"tools": {
"create_new_building": {
"limits": [
{
"counter": "create_new_building_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_new_building stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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create_new_building. It is categorised as a Write tool in the Openstudio MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Openstudio MCP server in PolicyLayer and add a rule for create_new_building: 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.
create_new_building is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_new_building 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 create_new_building. 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.
create_new_building 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.