list-cost-category-definitions
AI agents call list-cost-category-definitions 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 retrieves or queries cost category definitions. The 'list-' prefix is conventionally used for read operations that return data without side effects. Although the description is empty (lowering confidence slightly), the name itself provides sufficient evidence that this is a Read operation. No modification, deletion, execution, or financial transaction capability is indicated.
From the tool's definition Tool name 'list-cost-category-definitions' indicates a listing/retrieval operation. The 'list-' prefix is a strong signal of a read-only query operation that retrieves existing cost category definitions without modifying state.
Attacks that exploit this kind of access
list-cost-category-definitions. 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-cost-category-definitions: 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-cost-category-definitions 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-cost-category-definitions 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-cost-category-definitions. 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-cost-category-definitions 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.