List all available FreeCAD workbenches. Returns: List of dictionaries, each containing: - name: Workbench internal name - label: Display label - is_active: Whether workbench is currently active
AI agents call list_workbenches 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 straightforward query operation that retrieves and returns information about available workbenches in FreeCAD. It performs no modifications, deletions, or external operations. The low severity reflects that workbench enumeration provides only informational data that could help an agent understand available functionality, with minimal risk of misuse.
From the tool's definition Tool description states it 'List all available FreeCAD workbenches' and 'Returns: List of dictionaries' containing workbench metadata. The verb 'list' and return-only behavior indicate pure data retrieval with no side effects.
Documented attack patterns abuse exactly the kind of access list_workbenches 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 list_workbenches:
{
"version": "1",
"default": "deny",
"tools": {
"list_workbenches": {}
}
}list_workbenches is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all available FreeCAD workbenches. Returns: List of dictionaries, each containing: - name: Workbench internal name - label: Display label - is_active: Whether workbench is currently active. 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 list_workbenches: 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.
list_workbenches 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 list_workbenches 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 list_workbenches. 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.
list_workbenches 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.