Agent Tool Schemas

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "additionalProperties": false,
  "required": ["userId"],
  "properties": {
    "userId": { "type": "string", "maxLength": 120 },
    "walletAddress": { "type": "string", "pattern": "^0x[a-fA-F0-9]{40}$" },
    "walletLabel": { "type": "string", "maxLength": 120 }
  }
}