MCP サーバーおよびツール Telemetry

server.registerTool(
  "lookup-account",
  {
    title: "Look up account",
    description: "Return an approved account summary",
    inputSchema: { accountId: z.string() },
  },
  async ({ accountId }) => {
    const startedAt = performance.now();
    const toolCallId = crypto.randomUUID();
    let status = "success";
    let errorType;

    try {
      const summary = await lookupApprovedAccountSummary(accountId);
      return {
        content: [{ type: "text", text: summary }],
      };
    } catch (error) {
      status = "failed";
      errorType = classifyToolError(error);
      return {
        content: [{ type: "text", text: "Account lookup failed" }],
        isError: true,
      };
    } finally {
      await telemetry.log("mcp_tool_completed", {
        tool_call_id: toolCallId,
        server_name: "account-tools",
        tool_name: "lookup-account",
        status,
        error_type: errorType,
        duration_ms: Math.round(performance.now() - startedAt),
        release: process.env.APP_RELEASE,
      }).catch(reportTelemetryDeliveryFailure);
    }
  },
);