list_agent_runtime_versions
AI agents call list_agent_runtime_versions 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 clearly follows the read pattern (list_*). It retrieves or enumerates agent runtime versions without modifying, executing, or deleting anything. The empty description lowers confidence slightly, but the naming convention is unambiguous. Low severity because listing metadata about runtime versions has minimal blast radius if misused by an AI agent.
From the tool's definition Tool name 'list_agent_runtime_versions' indicates a query/retrieval operation that lists available runtime versions. No description provided, but the 'list_' prefix is a strong indicator of a read-only operation.
Attacks that exploit this kind of access
list_agent_runtime_versions. 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_agent_runtime_versions: 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_agent_runtime_versions 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_agent_runtime_versions 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_agent_runtime_versions. 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_agent_runtime_versions 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.