Discover installed OpenSCAD libraries on the system. Searches standard OpenSCAD library paths for the current platform, plus the OPENSCADPATH environment variable. For each found library directory, lists subdirectories as libraries and reports file counts, README presence, and main entry files. T...
AI agents call get_libraries to retrieve information from OpenSCAD MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
get_libraries retrieves information about available libraries without side effects. It searches library paths and reports metadata (names, file counts, README presence) but does not create, modify, delete, or execute any code. This is a purely informational/discovery operation, making it a Read operation with low severity.
From the tool's definition Tool description explicitly states 'This is a read-only operation' and the function 'Discover installed OpenSCAD libraries on the system' performs listing and querying of library directories with 'file_count, has_readme, and main entry files' reporting.
Documented attack patterns abuse exactly the kind of access get_libraries gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and OpenSCAD MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_libraries:
{
"version": "1",
"default": "deny",
"tools": {
"get_libraries": {}
}
}get_libraries is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Discover installed OpenSCAD libraries on the system. Searches standard OpenSCAD library paths for the current platform, plus the OPENSCADPATH environment variable. For each found library directory, lists subdirectories as libraries and reports file counts, README presence, and main entry files. This is a read-only operation that does not require OpenSCAD to be installed. Args: ctx: MCP context for logging Returns: Dict with success status, library_paths searched, and libraries list with name, path, file_count, has_readme, and main_files for each library. It is categorised as a Read tool in the OpenSCAD MCP Server MCP Server, which means it retrieves data without modifying state.
Register the OpenSCAD MCP Server MCP server in PolicyLayer and add a rule for get_libraries: 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 OpenSCAD MCP Server. Nothing to install.
get_libraries 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_libraries 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_libraries. 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_libraries is provided by the OpenSCAD MCP Server MCP server (quellant/openscad-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 13 OpenSCAD MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
13 OpenSCAD MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.