DescribeSchemaCommand

import { SchemasClient, DescribeSchemaCommand } from "@aws-sdk/client-schemas"; // ES Modules import
// const { SchemasClient, DescribeSchemaCommand } = require("@aws-sdk/client-schemas"); // CommonJS import
const client = new SchemasClient(config);
const input = { // DescribeSchemaRequest
  RegistryName: "STRING_VALUE", // required
  SchemaName: "STRING_VALUE", // required
  SchemaVersion: "STRING_VALUE",
};
const command = new DescribeSchemaCommand(input);
const response = await client.send(command);
// { // DescribeSchemaResponse
//   Content: "STRING_VALUE",
//   Description: "STRING_VALUE",
//   LastModified: new Date("TIMESTAMP"),
//   SchemaArn: "STRING_VALUE",
//   SchemaName: "STRING_VALUE",
//   SchemaVersion: "STRING_VALUE",
//   Tags: { // Tags
//     "<keys>": "STRING_VALUE",
//   },
//   Type: "STRING_VALUE",
//   VersionCreatedDate: new Date("TIMESTAMP"),
// };