Sweep a profile along a spine path. This is the Part workbench version of sweep, working directly on wires/faces rather than PartDesign sketches. Args: profile_name: Name of the profile wire/face object. spine_name: Name of the spine (path) wire object. solid: Whether to create a solid. Defaults ...
AI agents use part_sweep to create or update resources in FreeCAD Robust MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your FreeCAD Robust MCP Server environment.
This tool modifies the FreeCAD document by creating new geometry (Write category). It is not merely reading data (Read), nor is it executing arbitrary code (Execute), nor destructively deleting data (Destructive). While it creates geometry that could theoretically be undone via FreeCAD's undo system, the operation itself is a create/modify action.
From the tool's definition Tool creates a new 3D object by sweeping a profile along a spine path, resulting in a new geometric shape.
Documented attack patterns abuse exactly the kind of access part_sweep 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 part_sweep:
{
"version": "1",
"default": "deny",
"tools": {
"part_sweep": {
"limits": [
{
"counter": "part_sweep_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}part_sweep 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.
Free to start. No card required.
Sweep a profile along a spine path. This is the Part workbench version of sweep, working directly on wires/faces rather than PartDesign sketches. Args: profile_name: Name of the profile wire/face object. spine_name: Name of the spine (path) wire object. solid: Whether to create a solid. Defaults to True. frenet: Whether to use Frenet mode for orientation. Defaults to True. result_name: Name for result object. Auto-generated if None. doc_name: Document containing the objects. Uses active document if None. Returns: Dictionary with result object information: - name: Result object name - label: Result object label - type_id: Result object type. It is categorised as a Write tool in the FreeCAD Robust MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the FreeCAD Robust MCP Server MCP server in PolicyLayer and add a rule for part_sweep: 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.
part_sweep 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 part_sweep 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 part_sweep. 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.
part_sweep 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.