Delete a user macro. Note: Only user macros can be deleted. System macros are protected. Args: macro_name: Name of the macro to delete (without .FCMacro extension). Returns: Dictionary with delete result: - success: Whether deletion was successful - path: Path of deleted macro
AI agents call delete_macro to permanently remove resources in FreeCAD Robust MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently deletes user-created macros without the ability to recover them (beyond system backups). Deletion is irreversible and represents a destructive action. While scoped to user macros only (system macros are protected), an AI agent could still cause significant data loss if directed to delete important user-defined automation scripts.
From the tool's definition The tool description explicitly states 'Delete a user macro' and returns confirmation of deletion with the path of the deleted macro. This is an irreversible operation that removes data from the user's system.
Documented attack patterns abuse exactly the kind of access delete_macro 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 delete_macro:
{
"version": "1",
"default": "deny",
"hide": [
"delete_macro"
]
}delete_macro disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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Delete a user macro. Note: Only user macros can be deleted. System macros are protected. Args: macro_name: Name of the macro to delete (without .FCMacro extension). Returns: Dictionary with delete result: - success: Whether deletion was successful - path: Path of deleted macro. It is categorised as a Destructive tool in the FreeCAD Robust MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the FreeCAD Robust MCP Server MCP server in PolicyLayer and add a rule for delete_macro: 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.
delete_macro is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the delete_macro 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 delete_macro. 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.
delete_macro 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.