This review evaluates olive-pomace–derived amendments (compost, co-compost, and biochar) as agronomic inputs, with the specific aim of defining quality gates, usage envelopes, and soil–crop–risk safeguards applicable to Mediterranean and comparable pedoclimates. We conducted a narrative review with structured screening across major databases, including only studies that applied olive-pomace products to soil and reported quantitative soil and/or crop outcomes alongside product or soil quality indicators (e.g., germination index, electrical conductivity, pH, phenolics, and total/plant-available trace metals). To translate evidence into practice, we adapted established biosolids-compliance logic into product specifications and field-monitoring protocols tailored to olive-pomace amendments. Across field and pot trials, validated compost/co-compost programs at ~5–20 t DM ha⁻¹ yr⁻¹ generally increased soil organic carbon (SOC), water-stable aggregation (WSA), and enzymatic activity, while maintaining or improving yields. Biochar additions (≤10 t ha⁻¹) chiefly enhanced hydraulic and structural properties and helped moderate salinity/drought stress under controlled irrigation. Effective products consistently met GI ≥80–100%, pH 6.5–8.5, context-fit EC, declining phenolics, and low plant-available trace metals. Building on these findings, we provide a tabulated toolkit—product specifications, texture/cropping-system rate bands, and a verification plan (pH, EC, TOC, WSA, enzymes, phenolics, tissue tests, and edible-crop safeguards)—that operationalizes safe, performance-oriented use. Heterogeneity in extraction technology, storage, bulking agents, and pyrolysis settings limits cross-study meta-quantification; strong context-dependence (soil type, irrigation regime, salinity) remains a key constraint on generalization. The toolkit offers ready-to-apply labels/specs, dosing ranges, and monitoring checklists for farmers, advisors, and regulators, directly supporting circular-economy valorization of olive by-products. The review bridges the policy-to-practice gap by adapting quality-gate compliance to olive-pomace products, integrating product specifications with field-level monitoring, and codifying rate/timing guidance by texture and cropping system—together forming a coherent soil–crop–risk framework to accelerate safe, scalable adoption.