List available parts from the FreeCAD parts library. Returns: List of parts with: - name: Part filename - path: Full path to part file - category: Part category/folder
AI agents call list_parts_library to retrieve information from FreeCAD Robust MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure query/retrieval operation that fetches metadata about existing parts without creating, modifying, deleting, or executing any operations. The list operation is read-only with no blast radius if misused by an AI agent.
From the tool's definition Tool lists and returns information about available parts from the FreeCAD parts library (name, path, category) with no modification or side effects.
Documented attack patterns abuse exactly the kind of access list_parts_library gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and FreeCAD Robust MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_parts_library:
{
"version": "1",
"default": "deny",
"tools": {
"list_parts_library": {}
}
}list_parts_library is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List available parts from the FreeCAD parts library. Returns: List of parts with: - name: Part filename - path: Full path to part file - category: Part category/folder. It is categorised as a Read tool in the FreeCAD Robust MCP Server MCP Server, which means it retrieves data without modifying state.
Register the FreeCAD Robust MCP Server MCP server in PolicyLayer and add a rule for list_parts_library: 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 FreeCAD Robust MCP Server. Nothing to install.
list_parts_library 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_parts_library 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_parts_library. 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_parts_library is provided by the FreeCAD Robust MCP Server MCP server (spkane/freecad-addon-robust-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 152 FreeCAD Robust MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
152 FreeCAD Robust MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.