JSON Schema defines a formal way to validate JSON documents. In runtime design, it is useful for tool inputs, model outputs, response envelopes, trace events, policy configuration, and compatibility checks.
At a glance
- Organization
- JSON Schema project
- Runtime role
- Validation specification
- Category
- Protocols and Contracts
- Official documentation
- Visit official documentation opens in a new tab
Where it fits in the runtime stack
Cross-layer contract mechanism. JSON Schema is most visible at tool, trace, configuration, and structured-output boundaries.
Primary runtime role
Use JSON Schema wherever runtime behavior needs deterministic validation before storage, model routing, or side effects.
Not the same as
JSON Schema validates structure and constraints; it does not make unsafe actions safe without authorization and policy enforcement.
Integration notes
- Version schemas and validate at both inbound and outbound boundaries.
- Treat schema validation failures as first-class runtime errors with trace events.
- Keep business authorization separate from shape validation.
Questions before production use
- Which request, response, tool, trace, and memory objects need explicit schemas?
- How are schema versions migrated without breaking old traces?
- Does validation run before every side-effecting tool call?
Review and deprecation posture
This profile is reviewed as part of the aRuntime.com quarterly resource audit. If the official documentation moves, the project is archived, or the resource changes scope, this page should be updated with a dated status note rather than silently removed.
Sources and further reading
- JSON Schema Specification opens in a new tab — JSON Schema project; official specification; accessed 2026-06-20 UTC.
Last reviewed: .