AI agents call list_databases to retrieve information from Awslabs Amazon Sns Sqs without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
List operations are informational queries that retrieve and display existing data with no side effects. Even in the context of SNS/SQS messaging services, listing databases would retrieve metadata or configuration information without creating, modifying, or deleting resources. The low severity reflects that unauthorized listing typically has limited blast radius compared to write or destructive operations.
From the tool's definition Tool name 'list_databases' indicates a query/retrieval operation. The empty description limits certainty, but the naming convention aligns with standard read operations that enumerate resources without modification.
Documented attack patterns abuse exactly the kind of access list_databases gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Awslabs Amazon Sns Sqs, and nothing reaches the server without passing your rules. This is the rule we recommend for list_databases:
{
"version": "1",
"default": "deny",
"tools": {
"list_databases": {}
}
}list_databases is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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list_databases. It is categorised as a Read tool in the Awslabs Amazon Sns Sqs MCP Server, which means it retrieves data without modifying state.
Register the Awslabs Amazon Sns Sqs MCP server in PolicyLayer and add a rule for list_databases: 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 Amazon Sns Sqs. Nothing to install.
list_databases 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_databases 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_databases. 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_databases is provided by the Awslabs Amazon Sns Sqs MCP server (awslabs.amazon-sns-sqs-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Awslabs Amazon Sns Sqs, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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