MCP Tool Reference Low Risk

validate_cfn_security

Check compliance via cfn-guard

Part of the AWS MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.

awslabs/mcp Other

WHEN AI AGENTS USE THIS TOOL

AI agents call validate_cfn_security to perform operations in AWS. While the risk category is not fully classified, applying a rate limit gives you visibility into how often the tool is called and prevents unexpected bursts of activity from autonomous agents.

WHY ENFORCE A POLICY ON VALIDATE_CFN_SECURITY

Applying a policy to validate_cfn_security gives you an audit trail of every call an AI agent makes. Even for low-risk tools, visibility into agent behaviour helps you debug issues, optimise workflows, and maintain compliance with your organisation's security requirements.

RECOMMENDED POLICY

Apply a rate limit to control usage and monitor for unexpected behaviour.

aws.yaml 
tools:
  validate_cfn_security:
    rules:
      - action: allow
        rate_limit:
          max: 60
          window: 60

See the full AWS policy for all 55 tools.

DETAILS

Tool Name

validate_cfn_security

Category

Other

MCP Server

AWS MCP Servers

Risk Level

Low

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RELATED READING

FREQUENTLY ASKED QUESTIONS

What does the validate_cfn_security tool do?

Check compliance via cfn-guard. It is categorised as a Other tool in the AWS MCP Servers, which means it performs auxiliary operations.

How do I enforce a policy on validate_cfn_security?

Add a rule in your Intercept YAML policy under the tools section for validate_cfn_security. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the AWS MCP server.

What risk level is validate_cfn_security?

validate_cfn_security is a Other tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit validate_cfn_security?

Yes. Add a rate_limit block to the validate_cfn_security 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.

How do I block validate_cfn_security completely?

Set action: deny in the Intercept policy for validate_cfn_security. 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.

What MCP server provides validate_cfn_security?

validate_cfn_security is provided by the AWS MCP server (awslabs/mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.

ENFORCE POLICIES ON AWS

Open source. One binary. Zero dependencies.

VIEW ON GITHUB Full AWS policy →