{ "title": "MCP vs Function Calling — Normalized Claim Register", "schemaVersion": "1.0", "researchFreeze": "2026-08-25", "protocolRevision": "2026-07-28", "idNote": "claimId is globally namespaced; packageClaimId and packageSourceIds preserve the research/3 namespaces. 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"VERIFIED", "durability": "DURABLE", "notes": "Role separation remains analytically useful after lifecycle changes." }, { "claimId": "R3-C009", "packageClaimId": "C009", "packageClaim": "MCP is not synonymous with JSON-RPC.", "claim": "MCP is not synonymous with JSON-RPC.", "dateRange": "Current", "specVersion": "All MCP", "packageSourceIds": [ "STD001", "MCP022" ], "sourceIds": [ "S001", "S130" ], "confidence": "VERIFIED", "durability": "DURABLE", "notes": "MCP uses JSON-RPC envelopes and adds protocol-specific semantics." }, { "claimId": "R3-C010", "packageClaimId": "C010", "packageClaim": "Function calling is not ordinary programming-language function execution.", "claim": "Function calling is not ordinary programming-language function execution.", "dateRange": "Current", "specVersion": "Provider APIs", "packageSourceIds": [ "OAI002", "ANT001", "GOO001" ], "sourceIds": [ "S169", "S011", "S177" ], "confidence": "VERIFIED", "durability": "DURABLE", "notes": "The model emits a 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