Read the contents of a FreeCAD macro. Args: macro_name: Name of the macro to read (without .FCMacro extension). Returns: Dictionary with macro contents: - name: Macro name - code: Full macro code - path: Path to macro file
AI agents call read_macro 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 and queries macro file contents without side effects. It performs a simple read operation analogous to fetching or getting data. While the retrieved code could theoretically be malicious if executed elsewhere, the tool itself only reads and returns data, making it a Read category risk with low severity.
From the tool's definition Tool name 'read_macro' and description explicitly states it 'Read[s] the contents of a FreeCAD macro' with return values including 'code' and 'path'. No modification, deletion, or execution of the macro occurs—only retrieval.
Documented attack patterns abuse exactly the kind of access read_macro 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 read_macro:
{
"version": "1",
"default": "deny",
"tools": {
"read_macro": {}
}
}read_macro is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Read the contents of a FreeCAD macro. Args: macro_name: Name of the macro to read (without .FCMacro extension). Returns: Dictionary with macro contents: - name: Macro name - code: Full macro code - path: Path to macro file. 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 read_macro: 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.
read_macro 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 read_macro 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 read_macro. 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.
read_macro 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.