Lists all tables in a specified keyspace - args: keyspace
AI agents call listTables 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.
This tool performs a read-only operation to enumerate tables within a keyspace. It has no capability to modify, delete, or execute arbitrary operations. The blast radius of misuse is minimal—an attacker could discover table structure but cannot access data or cause damage. Classified as Read with low severity.
From the tool's definition Tool name 'listTables' and description 'Lists all tables in a specified keyspace' indicate a query operation that retrieves metadata without modification or side effects.
Attacks that exploit this kind of access
Lists all tables in a specified keyspace - args: keyspace. 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 listTables: 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.
listTables 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 listTables 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 listTables. 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.
listTables 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.