AWS Lets AI Agents Call Step Functions Workflows as Tools via AgentCore Gateway

AWS announced on October 29 that Standard and Express Step Functions workflows can now be exposed as MCP tools through Amazon Bedrock AgentCore Gateway. Previously, developers had to build and maintain custom glue code, such as a Lambda function or a custom MCP server, to let an agent start a workflow. The new built-in connector maps ten Step Functions API operations, and developers choose which ones an agent can see for each target. For operations that can be pinned, the workflow is fixed in the tool schema so the agent cannot select a different one. The article notes that unrestricted permissions are the main risk, so tools should be tied to a single workflow with a narrowly scoped role.
This is an AI-generated summary. ShortSingh links to the original source for the complete article.

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