Feature request: Add tentant_id field to Context object and propagate to logger

[leandrodamascena]

Use case

AWS Lambda RIC added a new field called tenantId and we need to add this field to the context. This must be a optional String and must check if tenantId is present in the context.

I tested with some functions and it's present while in others it's not.

Solution/User Experience

Add this field to the Context object and log it when injecting Lambda context.

Alternative solutions

Acknowledgment

• This feature request meets Powertools for AWS Lambda (TypeScript) Tenets
• Should this be considered in other Powertools for AWS Lambda languages? i.e. Python, Java, and .NET

Future readers

Please react with 👍 and your use case to help us understand customer demand.

[dreamorosi]

Thanks, sounds good.

I'll put this on hold for now, and we'll work on it next month.

[dreamorosi]

Need to check if the new field is present in the context already or not.

[dreamorosi]

Verified that the field is present in the runtime, below an example:

 {
  callbackWaitsForEmptyEventLoop: [Getter/Setter],
  succeed: [Function (anonymous)],
  fail: [Function (anonymous)],
  done: [Function (anonymous)],
  functionVersion: '$LATEST',
  functionName: 'TenantFn',
  memoryLimitInMB: '128',
  logGroupName: '/aws/lambda/TenantFn',
  logStreamName: '2025/07/15/TenantFn[$LATEST]5fe3c6d22b44430e91840af6f6304cd3',
  clientContext: undefined,
  identity: undefined,
  invokedFunctionArn: 'arn:aws:lambda:eu-west-1:536254204126:function:TenantFn',
  awsRequestId: 'cc3f97fc-219b-4cbf-86f0-d75763154364',
  tenantId: undefined,
  getRemainingTimeInMillis: [Function: getRemainingTimeInMillis]
}

[dreamorosi]

Opened a PR to the @types/aws-lambda repo to add this type for all customers: DefinitelyTyped/DefinitelyTyped#73265