Create a Part Line (edge) between two points. Args: point1: Start point as [x, y, z]. point2: End point as [x, y, z]. name: Object name. Auto-generated if None. doc_name: Target document. Uses active document if None. Returns: Dictionary with created object information: - name: Object name - labe...
AI agents use create_line 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 creates new geometric data (a line/edge) in a FreeCAD document, which is a reversible modification operation. It does not execute arbitrary code, delete data, or cause external side effects. Creating geometric primitives in a CAD application is a standard Write operation. Severity is low because the blast radius of misuse is limited to adding harmless geometry that can be easily undone or deleted.
From the tool's definition Tool creates a Part Line (edge) between two points, storing it as a named object in a FreeCAD document. The description explicitly states it 'Create[s] a Part Line' with parameters for start/end points and object naming, returning created object information.
Documented attack patterns abuse exactly the kind of access create_line 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 create_line:
{
"version": "1",
"default": "deny",
"tools": {
"create_line": {
"limits": [
{
"counter": "create_line_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_line 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.
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Create a Part Line (edge) between two points. Args: point1: Start point as [x, y, z]. point2: End point as [x, y, z]. name: Object name. Auto-generated if None. doc_name: Target document. Uses active document if None. Returns: Dictionary with created object information: - name: Object name - label: Object label - type_id: Object type - length: Line length. 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 create_line: 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.
create_line 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 create_line 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 create_line. 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.
create_line 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.