Parallels RAS MCP Server

Instructions

Implementation Reference

• src/tools/farm-settings.ts:109-128 (registration)

  Tool registration for 'ras_farm_get_performance' with schema definition (title, description, annotations) and handler function that makes GET request to /api/farm-settings/performance-monitor endpoint.
  server.registerTool( "ras_farm_get_performance", { title: "Performance Monitor", description: "Get performance monitor configuration and counters for the RAS farm. " + "Includes resource utilisation thresholds and monitoring settings. Use this " + "to review performance baselines or check monitoring configuration.", annotations: READ_ONLY_ANNOTATIONS, inputSchema: {}, }, async () => { try { const data = await rasClient.get("/api/farm-settings/performance-monitor"); return { content: [{ type: "text" as const, text: JSON.stringify(data, null, 2) }] }; } catch (err) { return { content: [{ type: "text" as const, text: sanitiseError(err, "Failed to retrieve performance monitor") }], isError: true }; } } );
• src/tools/farm-settings.ts:120-127 (handler)

  Handler function that executes the tool logic: calls rasClient.get() to retrieve performance monitor data from the RAS API and returns it as formatted JSON, with error handling using sanitiseError.
  async () => { try { const data = await rasClient.get("/api/farm-settings/performance-monitor"); return { content: [{ type: "text" as const, text: JSON.stringify(data, null, 2) }] }; } catch (err) { return { content: [{ type: "text" as const, text: sanitiseError(err, "Failed to retrieve performance monitor") }], isError: true }; } }
• src/client.ts:128-166 (helper)

  The rasClient.get() method used by the handler: performs authenticated GET requests to the RAS API with automatic login, token management, retry on 401, and request timeout handling.
  async get(path: string): Promise<unknown> { // Ensure we have a valid session if (!this.authToken) { await this.login(); } const fetchOptions = { method: "GET" as const, headers: { ...this.headers, auth_token: this.authToken!, }, signal: AbortSignal.timeout(REQUEST_TIMEOUT_MS), }; let response = await fetch(`${this.baseUrl}${path}`, fetchOptions); // Token may have expired — re-authenticate once and retry if (response.status === 401) { await this.login(); response = await fetch(`${this.baseUrl}${path}`, { ...fetchOptions, headers: { ...this.headers, auth_token: this.authToken!, }, signal: AbortSignal.timeout(REQUEST_TIMEOUT_MS), }); } if (!response.ok) { const body = await response.text(); throw new Error( `RAS API error (HTTP ${response.status}) on ${path}: ${body.substring(0, 300)}` ); } return response.json(); }
• src/client.ts:43-54 (helper)

  The sanitiseError() function used by the handler for error handling: sanitizes error messages by redacting auth tokens and passwords, truncates long messages, and adds context.
  function sanitiseError(err: unknown, context: string): string { const raw = err instanceof Error ? err.message : String(err); // Remove anything that looks like a token or password value let sanitised = raw .replace(/auth_token[=:]\s*\S+/gi, "auth_token=[REDACTED]") .replace(/password[=:]\s*\S+/gi, "password=[REDACTED]"); // Truncate excessively long API response bodies if (sanitised.length > 500) { sanitised = sanitised.substring(0, 500) + "... (truncated)"; } return `${context}: ${sanitised}`; }
• src/tools/farm-settings.ts:111-119 (schema)

  Tool schema definition including title 'Performance Monitor', description explaining the tool's purpose, read-only annotations, and empty inputSchema (no parameters required).
  { title: "Performance Monitor", description: "Get performance monitor configuration and counters for the RAS farm. " + "Includes resource utilisation thresholds and monitoring settings. Use this " + "to review performance baselines or check monitoring configuration.", annotations: READ_ONLY_ANNOTATIONS, inputSchema: {}, },