mcp-pyodide

Instructions

Implementation Reference

• src/lib/pyodide/pyodide-manager.ts:241-258 (handler)

  Core implementation of the pyodide_get-mount-points tool that retrieves the list of mounted directories from the internal mountPoints Map and formats the response.

  async getMountPoints() {
    if (!this.pyodide) {
      return formatCallToolError("Pyodide not initialized");
    }
  
    try {
      const mountPoints = Array.from(this.mountPoints.entries()).map(
        ([name, config]) => ({
          name,
          hostPath: config.hostPath,
          mountPoint: config.mountPoint,
        })
      );
      return formatCallToolSuccess(JSON.stringify(mountPoints, null, 2));
    } catch (error) {
      return formatCallToolError(error);
    }
  }

• src/handlers/index.ts:105-108 (handler)

  MCP server request handler switch case that dispatches the pyodide_get-mount-points tool call to PyodideManager.getMountPoints().

  case "pyodide_get-mount-points": {
    const results = await pyodideManager.getMountPoints();
    return results;
  }

• src/tools/index.ts:40-47 (schema)

  Tool schema and metadata definition, specifying the name, description, and empty input schema (no arguments required).

  export const GET_MOUNT_POINTS_TOOL: Tool = {
    name: "pyodide_get-mount-points",
    description: "List mounted directories",
    inputSchema: {
      type: "object",
      properties: {},
    },
  };

• src/handlers/index.ts:32-38 (registration)

  Tool registration in the TOOLS array exported for the ListTools MCP request handler.

  const TOOLS: Tool[] = [
    tools.EXECUTE_PYTHON_TOOL,
    tools.INSTALL_PYTHON_PACKAGES_TOOL,
    tools.GET_MOUNT_POINTS_TOOL,
    tools.LIST_MOUNTED_DIRECTORY_TOOL,
    tools.READ_IMAGE_TOOL,
  ];