list-delivery-streams
AI agents call list-delivery-streams to retrieve information from Amazon ElastiCache Memcached 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 strongly suggests listing/querying delivery streams, which is a non-destructive retrieval operation. Without a description, confidence is moderate but the naming convention and context of an ElastiCache Memcached server (where listing streams is a typical diagnostic/monitoring operation) support the Read classification. Severity is low because listing resources has minimal blast radius if misused.
From the tool's definition Tool name 'list-delivery-streams' indicates retrieval of delivery stream information. The name pattern 'list-*' is conventionally a read-only operation that enumerates resources without modification. No description provided to contradict this.
Attacks that exploit this kind of access
list-delivery-streams. It is categorised as a Read tool in the Amazon ElastiCache Memcached MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Amazon ElastiCache Memcached MCP Server MCP server in PolicyLayer and add a rule for list-delivery-streams: 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 ElastiCache Memcached MCP Server. Nothing to install.
list-delivery-streams 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-delivery-streams 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-delivery-streams. 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-delivery-streams is provided by the Amazon ElastiCache Memcached MCP Server MCP server (awslabs.memcached-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.