describe-cost-category-definition
AI agents call describe-cost-category-definition 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 'describe' action pattern is a standard AWS convention for read-only operations that retrieve resource definitions and metadata. No side effects, modifications, or destructive actions are implied by the naming. The empty description reduces confidence slightly, but the naming convention is clear enough to classify this as a Read operation with low severity (queries cost category metadata).
From the tool's definition Tool name 'describe-cost-category-definition' indicates a retrieval operation with 'describe' prefix, which typically fetches or queries configuration data without modification.
Attacks that exploit this kind of access
describe-cost-category-definition. 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 describe-cost-category-definition: 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.
describe-cost-category-definition 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 describe-cost-category-definition 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 describe-cost-category-definition. 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.
describe-cost-category-definition 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.