AI agents call get_ifc_quantities to retrieve information from Bonsai-mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves quantitative information (quantities/qtos) from an IFC building model. The language 'Extract and get' describes a read-only query operation that returns data without altering the project state. No execution, modification, deletion, or financial operations are involved. Severity is low because querying project metadata poses minimal risk even if misused by an AI agent.
From the tool's definition Tool name 'get_ifc_quantities' and description 'Extract and get basic qtos about the IFC project' indicate retrieval of quantity takeoff (qtos) data from an IFC model without modification or side effects.
Documented attack patterns abuse exactly the kind of access get_ifc_quantities gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Bonsai-mcp, and nothing reaches the server without passing your rules. This is the rule we recommend for get_ifc_quantities:
{
"version": "1",
"default": "deny",
"tools": {
"get_ifc_quantities": {}
}
}get_ifc_quantities is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Extract and get basic qtos about the IFC project. It is categorised as a Read tool in the Bonsai-mcp MCP Server, which means it retrieves data without modifying state.
Register the Bonsai- MCP server in PolicyLayer and add a rule for get_ifc_quantities: 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 Bonsai-mcp. Nothing to install.
get_ifc_quantities 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_ifc_quantities 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_ifc_quantities. 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_ifc_quantities is provided by the Bonsai- MCP server (jotaderodriguez/bonsai_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Bonsai-mcp, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
17 Bonsai-mcp tools catalogued and risk-classified — across an index of 43,000+ MCP servers.