describe-cost-category-definition
AI agents call describe-cost-category-definition to retrieve information from Awslabs Valkey without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The name indicates a descriptive/read operation typical of AWS 'describe-*' API calls that retrieve metadata without modification. However, confidence is moderate (0.65) because the description is empty and provides no explicit confirmation of read-only behavior. The tool appears to query cost management configuration data, which is a read operation with minimal blast radius if misused.
From the tool's definition Tool name 'describe-cost-category-definition' suggests querying/retrieving cost category definitions with no side effects.
Attacks that exploit this kind of access
describe-cost-category-definition. It is categorised as a Read tool in the Awslabs Valkey MCP Server, which means it retrieves data without modifying state.
Register the Awslabs Valkey 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 Awslabs Valkey. 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 Awslabs Valkey MCP server (awslabs.valkey-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.