Guides AI model choices in new workflows, existing workflows, pasted workflow JSON, and model-availability questions. Load before recommending, selecting, replacing, or judging a model. Preserve working or explicitly requested IDs. An unfamiliar name or generic 404 does not establish that a model is invalid. Do not claim otherwise or suggest a replacement without provider evidence. Prefer credential-specific resource lookup when available. Use searchModels only to choose an unspecified model without a relevant credential or suitable named recommendation, never to validate a supplied ID or diagnose an existing failure. For a new choice, do not narrow discovery to a remembered model ID. Do not choose GPT-4-family or Claude 3.x for an unspecified model unless verified access constraints require them. Also activated when inspecting a model-bearing node.