List all VPCs in the AWS account with their details.
AI agents call list_vpcs to retrieve information from Network Security Control Reviews without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a read-only operation that retrieves VPC configuration data from AWS. While the severity is 'medium' rather than 'low' because VPC enumeration could inform reconnaissance attacks or help an attacker understand the target infrastructure, the tool itself performs no destructive, financial, or execution-based actions.
From the tool's definition Tool description states 'List all VPCs' — a retrieval operation with 'no side effects'. The tool queries and returns information about existing AWS infrastructure without modifying, deleting, or executing anything.
Attacks that exploit this kind of access
List all VPCs in the AWS account with their details. It is categorised as a Read tool in the Network Security Control Reviews MCP Server, which means it retrieves data without modifying state.
Register the Network Security Control Reviews MCP server in PolicyLayer and add a rule for list_vpcs: 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 Network Security Control Reviews. Nothing to install.
list_vpcs 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_vpcs 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_vpcs. 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_vpcs is provided by the Network Security Control Reviews MCP server (joshdoesit/network-security-control-reviews-with-mcp-and-llms). 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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