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Deploying an extension layer doesn't set description #906

@mheffner

Description

@mheffner

I'm deploying a lambda extension layer with cargo lambda deploy and would like to set the description field. However, even with setting it I don't see a description set on the layer.

After running this:

cargo lambda deploy --extension --compatible-runtimes provided.al2023 --description "Tag=ace25ce" --binary-name xxxxx
✅ extension uploaded successfully 🎉
🛠️  binary last compiled now
🔍 extension arn: arn:aws:lambda:us-east-1:xxx:layer:xxx:66

I don't see a description set:

aws lambda list-layer-versions --region us-east-1 --layer-name xxxx

{
    "LayerVersions": [
        {
            "LayerVersionArn": "arn:aws:lambda:us-east-1:xxx:layer:xxx:66",
            "Version": 66,
            "CreatedDate": "2026-01-22T21:07:21.998+0000",
            "CompatibleRuntimes": [
                "provided.al2023"
            ],
            "CompatibleArchitectures": [
                "x86_64"
            ]
        },
...

I also don't see a description in the UI:

Image
cargo-lambda 1.8.6 (345c38a 2025-07-18Z)

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