Need to avoid using markdown and keep the language clear and concise. Also, make sure all the provided information is correct. Let me check if "Agent Provocateur" was indeed their first album in over 15 years. Foreigner's last album before 2013 was "Mr. Big" in 2004, so yes, about 9 years, not 15. Hmm, maybe the user meant between their previous album and "Agent Provocateur," but I should verify that. Wait, Foreigner's discography shows "Uncommon Valor" in 1998, then "No End in Sight" in 2004, "Agent Provocateur" in 2013. So between "No End in Sight" and "Agent Provocateur" is about 9 years. Maybe the user said "over a decade and a half" as an exaggeration. I should be precise here.