{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://adcontextprotocol.org/schemas/3.2.1/error-details/execution-requirement-unmet.json",
  "title": "Execution Requirement Unmet Details",
  "description": "Experimental (`media_buy.execution_requirements`). Details shape a seller that declares `execution_requirements` MUST use for a `VALIDATION_ERROR` returned because a buyer-supplied package does not satisfy an `event_source` or `catalog` entry in its product's `execution_requirements`. Unmet `downstream_connection` requirements use `AUTHORIZATION_REQUIRED` with `error-details/authorization-required.json` instead. `error.field` names the first unmet binding; `unmet_requirements[]` lists every unmet requirement found. A seller that also emits `issues[]` SHOULD emit one entry per unmet requirement, in the same order.",
  "type": "object",
  "properties": {
    "unmet_requirements": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "properties": {
          "product_id": {
            "type": "string",
            "minLength": 1,
            "description": "Product whose requirement is unmet.",
            "x-entity": "product"
          },
          "field": {
            "type": "string",
            "minLength": 1,
            "description": "Request path where the resource binds, in the same JSONPath-lite form as `error.field`: `packages[i].optimization_goals` or `packages[i].catalogs` on `create_media_buy`; `new_packages[i].…` or `packages[i].…` on `update_media_buy`. For `not_found` and `ineligible`, sellers SHOULD point at the offending entry (for example `packages[0].optimization_goals[1].event_sources[0]` or `packages[0].catalogs[0]`)."
          },
          "reason": {
            "type": "string",
            "enum": [
              "not_bound",
              "not_found",
              "ineligible"
            ],
            "description": "`not_bound`: the package does not reference a resource of this kind. `not_found`: the referenced resource is not available to the account (for example an `event_source_id` that was never registered through `sync_event_sources`); register or sync it, then retry. `ineligible`: the referenced resource exists but does not satisfy the requirement (for example an event type or catalog type the requirement does not list)."
          },
          "requirement": {
            "$ref": "https://adcontextprotocol.org/schemas/3.2.1/core/product-execution-requirement.json",
            "description": "The product's declared requirement, echoed so the buyer can fix the request without another `get_products` call."
          }
        },
        "required": [
          "product_id",
          "field",
          "reason",
          "requirement"
        ],
        "additionalProperties": true
      }
    }
  },
  "required": [
    "unmet_requirements"
  ],
  "additionalProperties": true,
  "examples": [
    {
      "unmet_requirements": [
        {
          "product_id": "social_conversions_feed",
          "field": "packages[0].optimization_goals",
          "reason": "not_bound",
          "requirement": {
            "kind": "event_source",
            "event_types": [
              "purchase"
            ]
          }
        }
      ]
    }
  ]
}