Add or update contact.
Create a brand-new contact or merge into an existing record — name, email, phone, vehicle of interest, source. Identity stays single across every downstream tool.
{
"name": "Dave Chen",
"email": "dchen@gmail.com",
"phone": "+1-416-555-0142",
"vehicle": "2026 RAV4 XLE",
"source": "claude.assistant"
}