Document allowlisting prerequisite for deployment and registration

Partners and customers need their AWS account allowlisted for the
AWS Transform composability initiative before they can deploy or
register agents. This wasn't mentioned anywhere, causing confusion
when users hit access errors after building their agent.

Author: lzongren

README.md

@@ -5,6 +5,12 @@
 
 Build custom agents for [AWS Transform](https://aws.amazon.com/transform/). The agent builder toolkit enables AWS Partners and customers to build agents tailored to their specific modernization needs that work within AWS Transform.
 
+## Prerequisites
+
+Registering and deploying agents to AWS Transform requires your AWS account to be allowlisted for the [AWS Transform composability initiative](https://aws.amazon.com/transform/partners/). If you haven't joined yet, contact your Partner Development Manager (PDM) or apply through [AWS Partner Central](https://aws.amazon.com/transform/partners/).
+
+You can still use the toolkit locally for agent development, documentation search, and testing without allowlisting — only deployment and registration require it.
+
 ## Getting Started
 
 ### Install via Kiro (recommended)

packages/mcp-server/README.md

@@ -50,6 +50,7 @@ Tools are grouped into six categories:
 
 - Python 3.11+
 - AWS credentials configured (standard `boto3` credential chain) for deployment and CloudWatch tools. Search and validation work offline.
+- **Deployment & registration tools**: Your AWS account must be allowlisted for the [AWS Transform composability initiative](https://aws.amazon.com/transform/partners/). Contact your Partner Development Manager (PDM) or apply through AWS Partner Central. Search and validation tools work without allowlisting.
 
 ## Development
 

packages/sdk/README.md

@@ -146,6 +146,7 @@ if __name__ == "__main__":
 - Python 3.11+
 - AWS credentials configured (standard `boto3` credential chain), with Bedrock access for model inference
 - The `agent-builder-agentic-mcp` binary on disk — see [agent-builder-agentic-mcp-aws-transform](https://pypi.org/project/agent-builder-agentic-mcp-aws-transform/)
+- **Calling other AWS Transform agents**: Your AWS account must be allowlisted for the [AWS Transform composability initiative](https://aws.amazon.com/transform/partners/). Contact your Partner Development Manager (PDM) or apply through AWS Partner Central.
 
 ## License