SecItemAdd creates keychain item with label "octagon-com.apple.security.keychain" instead of provided kSecAttrLabel

I use the following code to save a private key with a custom label, but the Keychain app shows an entry with name and account octagon-com.apple.security.keychain and type Octagon Account State (com.apple.security.keychain,defaultContext). (This entry, by the way, stays in the Keychain app even after trying to remove it from the Keychain app itself.) Can these values be customized, and what is kSecAttrLabel if it's not displayed in the Keychain app? The documentation only reads The corresponding value is of type CFString and contains the user-visible label for this item.

class AppDelegate: NSObject, NSApplicationDelegate {

    func applicationDidFinishLaunching(_ aNotification: Notification) {
        do {
            try storeKey("asdf")
        } catch {
            print(error)
        }
    }
    
    private func storeKey(_ key: String) throws {
        guard let data = Data(base64Encoded: key) else {
            fatalError()
        }
        let status = SecItemAdd([kSecClass as String: kSecClassKey, kSecAttrLabel as String: "Asdf", kSecAttrApplicationTag as String: "com.example.app2".data(using: .utf8)!, kSecAttrKeyClass as String: kSecAttrKeyClassPrivate, kSecValueData as String: data, kSecAttrSynchronizable as String: true] as [String: Any] as CFDictionary, nil)
        if status != errSecSuccess {
            throw NSError(domain: NSOSStatusErrorDomain, code: Int(status))
        }
    }

}