AI agents use mirrored_feature 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.
Mirroring a feature in CAD creates or modifies a model by duplicating and transforming geometry. This is a Write operation—it creates new geometry that can be undone or deleted. It is not Destructive because mirroring is reversible in FreeCAD (undo/delete available). Severity is medium because misuse could corrupt a user's 3D model design, but the impact is confined to the current session and recoverable.
From the tool's definition Tool name 'mirrored_feature' suggests creating a mirrored copy of a 3D feature in FreeCAD, which is a reversible modeling operation. No description provided, requiring inference from name and context of sibling sketch/geometry tools.
Documented attack patterns abuse exactly the kind of access mirrored_feature 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 mirrored_feature:
{
"version": "1",
"default": "deny",
"tools": {
"mirrored_feature": {
"limits": [
{
"counter": "mirrored_feature_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}mirrored_feature 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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mirrored_feature. 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 mirrored_feature: 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.
mirrored_feature 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 mirrored_feature 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 mirrored_feature. 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.
mirrored_feature 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.
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152 FreeCAD Robust MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.