list-billing-groups
AI agents call list-billing-groups to retrieve information from Amazon MQ MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool name strongly suggests it retrieves billing group data without modifying it. While the description is empty (which lowers confidence slightly), the naming convention and the context of an MCP server for managing MQ brokers indicate this is a query operation. It falls under Read category as the most likely use case is to fetch billing group metadata for informational purposes.
From the tool's definition Tool name 'list-billing-groups' indicates a listing/query operation that retrieves billing group information. The 'list-' prefix is typical of read-only operations.
Attacks that exploit this kind of access
list-billing-groups. It is categorised as a Read tool in the Amazon MQ MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Amazon MQ MCP Server MCP server in PolicyLayer and add a rule for list-billing-groups: 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 Amazon MQ MCP Server. Nothing to install.
list-billing-groups 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-billing-groups 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-billing-groups. 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-billing-groups is provided by the Amazon MQ MCP Server MCP server (awslabs.amazon-mq-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.