memory_list_actors
AI agents call memory_list_actors 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 'list' verb in the tool name indicates data retrieval with no side effects. However, the empty description and unclear naming ('memory_list_actors') introduce uncertainty about the actual operation. In the absence of contradictory evidence, the naming pattern points to a Read operation that retrieves actor information, which would have minimal blast radius if misused by an AI agent.
From the tool's definition Tool name 'memory_list_actors' suggests a listing/querying operation consistent with Read category (list pattern). Description is empty, reducing confidence.
Attacks that exploit this kind of access
memory_list_actors. 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 memory_list_actors: 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.
memory_list_actors 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 memory_list_actors 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 memory_list_actors. 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.
memory_list_actors 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.