Get detailed information about a sketch. Args: sketch_name: Name of the sketch. doc_name: Document containing the sketch. Uses active document if None. Returns: Dictionary with sketch information: - name: Sketch name - geometry_count: Number of geometry elements - constraint_count: Number of cons...
AI agents call get_sketch_info 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 is a query/inspection tool that retrieves sketch metadata and state information from FreeCAD. It has no side effects, does not modify the sketch or document, and merely provides informational output. It fits the Read category: 'retrieves or queries data; no side effects (search, list, get, fetch)'. The low severity reflects minimal risk if misused by an AI agent, as it cannot alter, delete, or execute code.
From the tool's definition Tool retrieves and returns detailed information about a sketch (name, geometry count, constraint count, external geometry count, fully_constrained status, degrees of freedom) without modifying, creating, deleting, or executing any operations.
Documented attack patterns abuse exactly the kind of access get_sketch_info 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_sketch_info:
{
"version": "1",
"default": "deny",
"tools": {
"get_sketch_info": {}
}
}get_sketch_info is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get detailed information about a sketch. Args: sketch_name: Name of the sketch. doc_name: Document containing the sketch. Uses active document if None. Returns: Dictionary with sketch information: - name: Sketch name - geometry_count: Number of geometry elements - constraint_count: Number of constraints - external_geometry_count: Number of external geometry references - fully_constrained: Whether sketch is fully constrained - dof: Degrees of freedom remaining. 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_sketch_info: 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_sketch_info 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_sketch_info 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_sketch_info. 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_sketch_info 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.