I'm investigating an environment variable that appears in a Vercel Node.js Function runtime but is not configured in my project's environment variables.

The variable name is AWS_LAMBDA_TLS_PROFILE.

Could someone from Vercel clarify:

1. Is this variable automatically injected by Vercel or its underlying execution environment?
2. What component sets it, and what is its purpose?
3. Is its value strictly non-sensitive configuration metadata, or could it contain credentials, secrets, or privileged key material?
4. Is it expected to be present across Node.js Function runtimes?

I'm specifically trying to determine whether it is safe to exempt this exact variable name from an application-level security guard that rejects unexpected AWS-related environment variables.

I don't need its actual value, only confirmation of its provenance and security characteristics.