Get the currently active FreeCAD document. Returns: Dictionary with document information, or None if no active document: - name: Internal document name - label: Display label - path: File path (None if not saved) - is_modified: Whether document has unsaved changes - objects: List of object names ...
AI agents call get_active_document 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 tool retrieves metadata about the current FreeCAD document state without any side effects. It performs a simple query operation that does not modify any data, execute code, or trigger external operations. The blast radius of misuse is minimal—an AI agent can only access information about what document is open and its contents, which presents no destructive or harmful capability.
From the tool's definition Tool description explicitly states it 'Get the currently active FreeCAD document' and 'Returns: Dictionary with document information'. The return values are all read-only queries: name, label, path, is_modified status, list of objects, and active object name.
Documented attack patterns abuse exactly the kind of access get_active_document 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 get_active_document:
{
"version": "1",
"default": "deny",
"tools": {
"get_active_document": {}
}
}get_active_document is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get the currently active FreeCAD document. Returns: Dictionary with document information, or None if no active document: - name: Internal document name - label: Display label - path: File path (None if not saved) - is_modified: Whether document has unsaved changes - objects: List of object names - active_object: Name of currently active object (None if none). 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 get_active_document: 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.
get_active_document 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_active_document 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_active_document. 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_active_document 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.