List all available versions of a Terraform provider.
AI agents call list_provider_versions to retrieve information from Terraform Registry MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a query operation that retrieves existing data (provider version listings) from the Terraform registry without modifying, deleting, or executing any infrastructure. It is purely informational and read-only, carrying minimal risk even if misused by an AI agent, as it cannot alter system state or incur costs.
From the tool's definition Tool 'list_provider_versions' retrieves and lists available versions of a Terraform provider from the registry.
Attacks that exploit this kind of access
List all available versions of a Terraform provider. It is categorised as a Read tool in the Terraform Registry MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Terraform Registry MCP Server MCP server in PolicyLayer and add a rule for list_provider_versions: 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 Terraform Registry MCP Server. Nothing to install.
list_provider_versions 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_provider_versions 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_provider_versions. 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_provider_versions is provided by the Terraform Registry MCP Server MCP server (qvakk/terraform-registry-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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