List approved Terraform modules in the registry.
AI agents call list_modules to retrieve information from Claude Iac without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays metadata about approved Terraform modules from a registry. It performs a read-only query operation that does not create, modify, delete, or execute any infrastructure changes. The action is informational only, supporting discovery of available modules for infrastructure planning.
From the tool's definition Tool name 'list_modules' and description 'List approved Terraform modules in the registry' indicate a query/retrieval operation with no side effects.
Attacks that exploit this kind of access
List approved Terraform modules in the registry. It is categorised as a Read tool in the Claude Iac MCP Server, which means it retrieves data without modifying state.
Register the Claude Iac MCP server in PolicyLayer and add a rule for list_modules: 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 Claude Iac. Nothing to install.
list_modules 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 list_modules 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 list_modules. 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.
list_modules is provided by the Claude Iac MCP server (net9876/claude-iac-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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