AI agents call get_selection 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 tool retrieves the current selection in FreeCAD, which is a read-only query with no side effects. Even with an empty description, the naming convention and peer tools strongly indicate it queries state rather than modifies it. Severity is low because selection data retrieval poses minimal risk to the FreeCAD project or system.
From the tool's definition Tool name 'get_selection' indicates retrieval of current selection state in FreeCAD. The absence of description is mitigated by context: sibling tools are all Write/Execute operations (add_sketch_*, activate_workbench), making 'get_selection' clearly a query…
Documented attack patterns abuse exactly the kind of access get_selection 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_selection:
{
"version": "1",
"default": "deny",
"tools": {
"get_selection": {}
}
}get_selection is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_selection. 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_selection: 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_selection 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_selection 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_selection. 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_selection 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.