This report synthesises findings from 11 peer-reviewed papers addressing the following research question: Does increasing causal structure depth in synthetic datasets improve the robustness of tabular foundation models against distribution shifts in standard ML benchmarks. 8 claims were extracted from source literature; 8 were independently verified against retrieved documents. An automated multi-reviewer quality assessment produced a score of 9.2/10. This report is a machine-generated literature synthesis and does not constitute original research. Research goal: Does increasing causal structure depth in synthetic datasets improve the robustness of tabular foundation models against distribution shifts in standard ML benchmarks? Autonomous literature synthesis. Automated review score: 9.2/10. Full text and citation available at Assignee Research.