Create and configure AWS infrastructure for streaming data processing. Handles Kafka clusters (MSK), Kinesis streams, DynamoDB streams, SQS queues with Lambda functions. Sets up VPCs, security groups, IAM roles, and Event Source Mappings. Generates complete SAM templates for deployment.
AI agents use esm_guidance to create or update resources in Amazon Bedrock Knowledge Base Retrieval MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Amazon Bedrock Knowledge Base Retrieval MCP Server environment.
This tool creates and configures AWS infrastructure components including VPCs, security groups, IAM roles, Kafka clusters, Kinesis streams, DynamoDB streams, SQS queues, and Lambda functions. These are Write/provisioning operations that create cloud resources. While it also generates SAM templates (which could be read-like), the primary action is infrastructure creation and configuration.
From the tool's definition Create and configure AWS infrastructure for streaming data processing... Sets up VPCs, security groups, IAM roles, and Event Source Mappings. Generates complete SAM templates for deployment.
Documented attack patterns abuse exactly the kind of access esm_guidance gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Amazon Bedrock Knowledge Base Retrieval MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for esm_guidance:
{
"version": "1",
"default": "deny",
"tools": {
"esm_guidance": {
"limits": [
{
"counter": "esm_guidance_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}esm_guidance stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Create and configure AWS infrastructure for streaming data processing. Handles Kafka clusters (MSK), Kinesis streams, DynamoDB streams, SQS queues with Lambda functions. Sets up VPCs, security groups, IAM roles, and Event Source Mappings. Generates complete SAM templates for deployment. It is categorised as a Write tool in the Amazon Bedrock Knowledge Base Retrieval MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Amazon Bedrock Knowledge Base Retrieval MCP Server MCP server in PolicyLayer and add a rule for esm_guidance: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Amazon Bedrock Knowledge Base Retrieval MCP Server. Nothing to install.
esm_guidance is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the esm_guidance rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for esm_guidance. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
esm_guidance is provided by the Amazon Bedrock Knowledge Base Retrieval MCP Server MCP server (awslabs.bedrock-kb-retrieval-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Amazon Bedrock Knowledge Base Retrieval MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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805 Amazon Bedrock Knowledge Base Retrieval MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.