{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/media-buy/decline-proposals-request.json",
  "title": "Decline Proposals Request",
  "description": "Terminally decline one or more immutable proposals. Repeating an already-applied decline with a new idempotency key succeeds with outcome declined and preserves the first recorded reason and detail; the proposal cannot later be executed.",
  "x-tool-summary": "Terminally decline one or more proposals and record the buyer's reason.",
  "type": "object",
  "x-mutates-state": true,
  "x-operation-family": "decline_proposals",
  "x-added-in": "3.2.0",
  "x-legacy-fallback": {
    "mode": "none"
  },
  "properties": {
    "adcp_version": {
      "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/version-envelope.json#/properties/adcp_version"
    },
    "adcp_major_version": {
      "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/version-envelope.json#/properties/adcp_major_version"
    },
    "context_id": {
      "type": "string",
      "minLength": 1
    },
    "context": {
      "allOf": [
        {
          "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/context.json"
        }
      ],
      "x-adcp-schema-uri": "/schemas/core/context.json"
    },
    "governance_context": {
      "type": "string",
      "minLength": 1,
      "maxLength": 4096
    },
    "push_notification_config": {
      "allOf": [
        {
          "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/push-notification-config.json"
        }
      ],
      "x-adcp-schema-uri": "/schemas/core/push-notification-config.json"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Client-generated key required for retry-safe proposal decline.",
      "minLength": 16,
      "maxLength": 255,
      "pattern": "^[A-Za-z0-9_.:-]{16,255}$"
    },
    "declines": {
      "type": "array",
      "description": "Proposal declines to apply. proposal_id is the semantic uniqueness key and values MUST be unique even when two entries otherwise differ; implementations enforce this rule because JSON Schema uniqueItems only compares whole objects. Results preserve request order.",
      "items": {
        "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/media-buy/proposal-decline.json"
      },
      "minItems": 1,
      "maxItems": 25,
      "uniqueItems": true
    },
    "opportunity": {
      "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/opportunity-context.json",
      "description": "Optional planning-cycle update. Every named proposal MUST belong to this opportunity_id. Sellers apply the update only when every result is declined; if any result is unable, the opportunity remains unchanged. Use status closed when these declines end the broader opportunity."
    }
  },
  "required": [
    "idempotency_key",
    "declines"
  ],
  "additionalProperties": false
}