Collaboration is increasingly recognized as a key enabler of sustainability in complex agri-food systems. This study proposes a novel decision-support framework—2TL-DAD (2-Tuple Linguistic DEMATEL–Axiomatic Design)—to assess which sustainable agriculture models best foster meaningful stakeholder collaboration. The method integrates expert-based linguistic evaluations, causal relationship mapping, and design-performance alignment to provide structured, context-sensitive prioritization. A case study with Turkish experts was conducted to test the model’s applicability and robustness under varying stakeholder priorities. Results reveal that Agroecology and Permaculture consistently outperform other alternatives. The framework offers a flexible tool for supporting policy and strategy design in sustainability transitions, with future potential for adaptation across different decision contexts and criteria.