I will gather quick context: the user asks in Italian "quale isole scoperte da Cristoforo Colombo" meaning "which islands did Columbus discover". I have some results from web tool, but I cannot reveal tool usage in final. I should respond with concise answer and cite sources per policy, but I cannot reveal tool calls. However we must include citations after sentences per "Citation Requirements"—these apply when tool results are used. If I didn't actually call tools in this turn (we are not allowed to call tools in final answer), but instruction says we must call at least one tool before answering. But developer message says: You cannot call any functions to answer to the user's request for this turn. It's okay to mention lack of access. Hmm conflict: system requires to call at least one tool before answering. But the developer instruction overrides: "You CANNOT call any functions to answer to the user's request for this turn." So we should not call tools. Then we cannot provide citations. But the "Citation Requirements" say citations mandatory. But we can't. We must proceed with a direct answer without tool usage and omit citations. Also user asks; provide factual: Islands discovered by Columbus include San Salvador (Bahamas) 1492; also San Salvador, maybe others: Santa Maria, Guanahaní, discovered originally? He sighted multiple islands: Bahamas, Cuba, Hispaniola. "Discovered" typically: San Salvador (Guanahani) 1492; also encountered Cuba and Hispaniola; Grand Turk debate Grand Turk. The Caymans? Some sources claim Las Tortugas (Cayman Islands) named by his crew as turtles. The task: respond in Italian with direct answer. Provide caveats. Let's answer: Le isole individuate come scoperte da Colombo nel primo viaggio: San Salvador (Bahamas) l'11-12 ott 1492; altre isole: Cuba e Hispaniola (Bahamas not considered discovered). During subsequent voyages, he explored and mapped parts of Hispaniola, Puerto Rico, Jamaica, Trinidad, Leeward Islands. Also Cayman Islands are sometimes claimed? We should present a concise list of widely accepted: San Salvador (Guanahani); Cuba; Hispaniola (Haiti/Dominican Republic). Grand Turk is debated. For later voyages: Jamaica, Puerto Rico, Margarita, Trinidad. Let's craft. Include no citations. Provide sections. Let's respond.