awsflow-lambda

name	awsflow-lambda
description	Manage AWS Lambda functions using awsflow. Create, update, invoke, and delete functions, manage aliases/versions, event source mappings, layers, tags, function URLs, concurrency, and code signing.

Awsflow Lambda

Manage AWS Lambda functions, event source mappings, aliases, versions, and layers.

When to Use This Skill

Use this skill when the user:

• Asks about Lambda functions or serverless
• Wants to invoke a Lambda function
• Needs to update function code
• Wants to inspect function configuration, concurrency, or URLs
• Asks about event source mappings (SQS, SNS, DynamoDB, Kinesis triggers)
• Needs to manage aliases, versions, or layers
• Wants to tag or untag Lambda resources
• Wants to create, update, or delete Lambda functions
• Needs to manage permissions or function URLs

Tool: LambdaTool

Execute AWS Lambda commands including lifecycle management and event source mappings. ALWAYS provide params object.

Commands

ListFunctions

List Lambda functions.

{ "command": "ListFunctions", "params": { "MaxItems": 50 } }

Parameters:

Parameter	Type	Required	Description
FunctionVersion	string	No	Set to ALL to include all versions
Marker	string	No	Pagination marker from previous response
MaxItems	number	No	Maximum number of functions to return
MasterRegion	string	No	For Lambda@Edge, the region of the master function

GetFunction

Get function details including code location.

{ "command": "GetFunction", "params": { "FunctionName": "my-function" } }

Parameters:

Parameter	Type	Required	Description
FunctionName	string	Yes	Function name or ARN
Qualifier	string	No	Function version or alias

GetFunctionConfiguration

Get function configuration (runtime, handler, memory, timeout, environment, role, etc.).

{ "command": "GetFunctionConfiguration", "params": { "FunctionName": "my-function" } }

Parameters:

Parameter	Type	Required	Description
FunctionName	string	Yes	Function name or ARN
Qualifier	string	No	Function version or alias

GetFunctionConcurrency

Get reserved concurrency settings.

{ "command": "GetFunctionConcurrency", "params": { "FunctionName": "my-function" } }

Parameters:

Parameter	Type	Required	Description
FunctionName	string	Yes	Function name or ARN

GetFunctionCodeSigningConfig

Get code signing configuration.

{ "command": "GetFunctionCodeSigningConfig", "params": { "FunctionName": "my-function" } }

Parameters:

Parameter	Type	Required	Description
FunctionName	string	Yes	Function name or ARN

GetFunctionUrlConfig

Get function URL configuration.

{ "command": "GetFunctionUrlConfig", "params": { "FunctionName": "my-function" } }

Parameters:

Parameter	Type	Required	Description
FunctionName	string	Yes	Function name or ARN

GetPolicy

Get the resource-based policy attached to a function.

{ "command": "GetPolicy", "params": { "FunctionName": "my-function" } }

Parameters:

Parameter	Type	Required	Description
FunctionName	string	Yes	Function name or ARN

GetAccountSettings

Get Lambda account-level settings and limits.

{ "command": "GetAccountSettings", "params": {} }

Parameters: None required.

Invoke

Invoke a Lambda function.

{ "command": "Invoke", "params": { "FunctionName": "my-function", "Payload": "{\"key\":\"value\"}", "InvocationType": "RequestResponse", "LogType": "Tail" } }

Parameters:

Parameter	Type	Required	Description
FunctionName	string	Yes	Function name or ARN
Payload	string	No	JSON string payload to pass to function
InvocationType	string	No	Event (async), RequestResponse (sync), DryRun (validate)
LogType	string	No	None or Tail (include execution log in response)
Qualifier	string	No	Function version or alias
ClientContext	string	No	Base64-encoded client context data

UpdateFunctionCode

Update a function's deployment package.

{ "command": "UpdateFunctionCode", "params": { "FunctionName": "my-function", "S3Bucket": "code-bucket", "S3Key": "code.zip", "Publish": true } }

Parameters:

Parameter	Type	Required	Description
FunctionName	string	Yes	Function name or ARN
ZipFile	string	No	Base64-encoded zip file containing function code
S3Bucket	string	No	S3 bucket containing the function code
S3Key	string	No	S3 object key for the function code
S3ObjectVersion	string	No	S3 object version
ImageUri	string	No	URI of a container image in Amazon ECR
Publish	boolean	No	Publish a new version after updating
DryRun	boolean	No	Validate without updating
RevisionId	string	No	Update only if revision ID matches
Architectures	array of strings	No	Instruction set: x86_64 or arm64

Lifecycle Commands

CreateFunction

Create a new Lambda function.

{ "command": "CreateFunction", "params": { "FunctionName": "my-func", "Runtime": "nodejs18.x", "Role": "arn:aws:iam::123456789012:role/LambdaRole", "Handler": "index.handler", "Code": { "S3Bucket": "code-bucket", "S3Key": "code.zip" } } }

UpdateFunctionConfiguration

Update function configuration.

{ "command": "UpdateFunctionConfiguration", "params": { "FunctionName": "my-func", "MemorySize": 512, "Timeout": 30 } }

DeleteFunction

Delete a function.

{ "command": "DeleteFunction", "params": { "FunctionName": "my-func" } }

CreateEventSourceMapping

Create an event source mapping.

{ "command": "CreateEventSourceMapping", "params": { "FunctionName": "my-func", "EventSourceArn": "arn:aws:sqs:us-east-1:123456789012:queue", "StartingPosition": "LATEST" } }

AddPermission

Add a resource-based permission.

{ "command": "AddPermission", "params": { "FunctionName": "my-func", "StatementId": "sns-invoke", "Action": "lambda:InvokeFunction", "Principal": "sns.amazonaws.com", "SourceArn": "arn:aws:sns:us-east-1:123456789012:topic" } }

CreateFunctionUrlConfig

Create a function URL.

{ "command": "CreateFunctionUrlConfig", "params": { "FunctionName": "my-func", "AuthType": "NONE" } }

PutFunctionConcurrency

Set reserved concurrency.

{ "command": "PutFunctionConcurrency", "params": { "FunctionName": "my-func", "ReservedConcurrentExecutions": 10 } }

PublishVersion

Publish a new version.

{ "command": "PublishVersion", "params": { "FunctionName": "my-func" } }

CreateAlias

Create an alias for a version.

{ "command": "CreateAlias", "params": { "FunctionName": "my-func", "Name": "prod", "FunctionVersion": "1" } }

UpdateAlias

Update an alias.

{ "command": "UpdateAlias", "params": { "FunctionName": "my-func", "Name": "prod", "FunctionVersion": "2" } }

DeleteAlias

Delete an alias.

{ "command": "DeleteAlias", "params": { "FunctionName": "my-func", "Name": "prod" } }

PublishLayerVersion

Publish a new layer version.

{ "command": "PublishLayerVersion", "params": { "LayerName": "my-layer", "Content": { "S3Bucket": "code-bucket", "S3Key": "layer.zip" } } }

ListAliases

List aliases for a function.

{ "command": "ListAliases", "params": { "FunctionName": "my-function" } }

Parameters:

Parameter	Type	Required	Description
FunctionName	string	Yes	Function name or ARN

GetAlias

Get details of a specific alias.

{ "command": "GetAlias", "params": { "FunctionName": "my-function", "Name": "prod" } }

Parameters:

Parameter	Type	Required	Description
FunctionName	string	Yes	Function name or ARN
Name	string	Yes	Alias name

ListVersionsByFunction

List published versions of a function.

{ "command": "ListVersionsByFunction", "params": { "FunctionName": "my-function" } }

Parameters:

Parameter	Type	Required	Description
FunctionName	string	Yes	Function name or ARN

ListEventSourceMappings

List event source mappings for a function.

{ "command": "ListEventSourceMappings", "params": { "FunctionName": "my-function" } }

Parameters:

Parameter	Type	Required	Description
FunctionName	string	No	Function name or ARN
EventSourceArn	string	No	ARN of event source (SQS, DynamoDB, Kinesis, etc.)

GetEventSourceMapping

Get details of an event source mapping.

{ "command": "GetEventSourceMapping", "params": { "UUID": "12345678-1234-1234-1234-123456789012" } }

Parameters:

Parameter	Type	Required	Description
UUID	string	Yes	Event source mapping UUID

ListLayerVersions

List versions for a Lambda layer.

{ "command": "ListLayerVersions", "params": { "LayerName": "my-layer" } }

Parameters:

Parameter	Type	Required	Description
LayerName	string	Yes	Layer name
CompatibleRuntime	string	No	Filter by compatible runtime
CompatibleArchitecture	string	No	Filter by compatible architecture

ListFunctionsByCodeSigningConfig

List functions using a code signing configuration.

{ "command": "ListFunctionsByCodeSigningConfig", "params": { "CodeSigningConfigArn": "arn:..." } }

Parameters:

Parameter	Type	Required	Description
CodeSigningConfigArn	string	Yes	Code signing config ARN

ListTags

List tags for a Lambda resource.

{ "command": "ListTags", "params": { "Resource": "arn:aws:lambda:us-east-1:123456789012:function:my-function" } }

Parameters:

Parameter	Type	Required	Description
Resource	string	Yes	Function ARN

TagResource

Add tags to a Lambda resource.

{ "command": "TagResource", "params": { "Resource": "arn:aws:lambda:...", "Tags": { "env": "prod" } } }

Parameters:

Parameter	Type	Required	Description
Resource	string	Yes	Function ARN
Tags	object	Yes	Key-value pairs for tags

UntagResource

Remove tags from a Lambda resource.

{ "command": "UntagResource", "params": { "Resource": "arn:aws:lambda:...", "TagKeys": ["env"] } }

Parameters:

Parameter	Type	Required	Description
Resource	string	Yes	Function ARN
TagKeys	array of strings	Yes	Tag keys to remove

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Related Services

• Lambda → CloudWatch Logs: Every Lambda function writes logs to /aws/lambda/{functionName}. Use CloudWatchLogTool with DescribeLogGroups prefix /aws/lambda/ to find them
• Lambda → SQS/SNS/DynamoDB/Kinesis: Use ListEventSourceMappings to discover trigger sources. Then use SQSTool, SNSTool, DynamoDBTool to inspect those sources
• Lambda → API Gateway: API Gateway integrations invoke Lambda. Use APIGatewayTool GetIntegration to find Lambda targets
• Lambda → IAM: Use GetFunctionConfiguration to find the execution role ARN, then IAMTool GetRole and ListAttachedRolePolicies to inspect permissions
• Lambda → S3: Functions often read/write S3. Use S3Tool to inspect referenced buckets
• Lambda → Step Functions: Lambda is commonly used as Step Functions task states
• Lambda → CloudFormation: Serverless functions managed by CloudFormation/SAM — use CloudFormationTool DescribeStackResources