describe-serverless-caches
AI agents call describe-serverless-caches 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 verb 'describe' is a standard AWS API pattern for retrieving resource metadata and configuration without modification. This is a Read operation. Severity is marked high because describing caches could expose sensitive configuration, connection strings, or infrastructure details that could aid further attacks, despite being read-only itself.
From the tool's definition Tool name 'describe-serverless-caches' suggests querying/describing AWS resource state; no destructive action indicated by the verb 'describe'. Description is empty, limiting confidence.
Attacks that exploit this kind of access
describe-serverless-caches. 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-serverless-caches: 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-serverless-caches 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-serverless-caches 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-serverless-caches. 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-serverless-caches 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.