DescribeDimensionCommand

import { IoTClient, DescribeDimensionCommand } from "@aws-sdk/client-iot"; // ES Modules import
// const { IoTClient, DescribeDimensionCommand } = require("@aws-sdk/client-iot"); // CommonJS import
const client = new IoTClient(config);
const input = { // DescribeDimensionRequest
  name: "STRING_VALUE", // required
};
const command = new DescribeDimensionCommand(input);
const response = await client.send(command);
// { // DescribeDimensionResponse
//   name: "STRING_VALUE",
//   arn: "STRING_VALUE",
//   type: "TOPIC_FILTER",
//   stringValues: [ // DimensionStringValues
//     "STRING_VALUE",
//   ],
//   creationDate: new Date("TIMESTAMP"),
//   lastModifiedDate: new Date("TIMESTAMP"),
// };