Generate comprehensive IAM policy for MSK cluster access with ESM. Creates an IAM policy document that grants the necessary permissions for Lambda Event Source Mapping to connect to and consume from MSK Kafka clusters. Includes permissions for cluster operations, topic access, consumer groups, a...
Part of the AWS Serverless MCP Server MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents call esm_msk_policy to retrieve information from AWS Serverless MCP Server without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though esm_msk_policy only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
tools:
esm_msk_policy:
rules:
- action: allowSee the full AWS Serverless MCP Server policy for all 32 tools.
Agents calling read-class tools like esm_msk_policy have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Read risk category across the catalogue. The same policy patterns (rate-limit, allow) apply to each.
Generate comprehensive IAM policy for MSK cluster access with ESM. Creates an IAM policy document that grants the necessary permissions for Lambda Event Source Mapping to connect to and consume from MSK Kafka clusters. Includes permissions for cluster operations, topic access, consumer groups, and VPC networking. Args: ctx: MCP context for logging region: AWS region where the MSK cluster is located account: AWS account ID that owns the MSK cluster cluster_name: Name of the MSK cluster cluster_uuid: UUID of the MSK cluster (use '*' for wildcard) partition: AWS partition (standard, China, or GovCloud) Returns: Dict containing complete IAM policy document with all required permissions. It is categorised as a Read tool in the AWS Serverless MCP Server MCP Server, which means it retrieves data without modifying state.
Add a rule in your Intercept YAML policy under the tools section for esm_msk_policy. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the AWS Serverless MCP Server MCP server.
esm_msk_policy is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the esm_msk_policy rule in your Intercept 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 Intercept policy for esm_msk_policy. 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_msk_policy is provided by the AWS Serverless MCP Server MCP server (awslabs.aws-serverless-mcp-server). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.