AI agents call get_sketch_diagnostics to retrieve information from FreeCAD MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool appears designed to query and return diagnostic data about sketches (constraints, geometry issues, etc.) in FreeCAD. The 'get_' prefix is standard for read operations.
From the tool's definition Tool name 'get_sketch_diagnostics' indicates a read operation that retrieves diagnostic information from a sketch; the empty description prevents certainty, but the 'get_' prefix and context of 'sketch diagnostics' strongly suggest querying/retrieving state…
Documented attack patterns abuse exactly the kind of access get_sketch_diagnostics gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and FreeCAD MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_sketch_diagnostics:
{
"version": "1",
"default": "deny",
"tools": {
"get_sketch_diagnostics": {}
}
}get_sketch_diagnostics is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_sketch_diagnostics. It is categorised as a Read tool in the FreeCAD MCP Server MCP Server, which means it retrieves data without modifying state.
Register the FreeCAD MCP Server MCP server in PolicyLayer and add a rule for get_sketch_diagnostics: 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 MCP Server. Nothing to install.
get_sketch_diagnostics 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_diagnostics 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_diagnostics. 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_diagnostics is provided by the FreeCAD MCP Server MCP server (theosib/freecad-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from FreeCAD MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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9 FreeCAD MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.