notifications/message

{
  "jsonrpc": "2.0",
  "method":  "notifications/message",
  "params": {
    "level":  "warning",
    "logger": "getmcp.tool.create_invoice",
    "data": {
      "message":   "Stripe rate limit at 80% of cap",
      "remaining": 12,
      "limit":     60
    }
  }
}

use GetMCP\Protocol\MessageEmitter;

MessageEmitter::emit(
    $session_id,
    'warning',                            // level
    'getmcp.tool.create_invoice',         // logger
    array(
        'message'   => 'Stripe rate limit at 80% of cap',
        'remaining' => 12,
        'limit'     => 60,
    )
);