AI agents call list_agent_runtimes 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.
The 'list' prefix strongly suggests this tool retrieves or enumerates agent runtimes without side effects. Although the description is empty (reducing confidence slightly), the naming convention and context of an SNS/SQS management server indicate this is a read-only query operation. No data modification, deletion, code execution, or financial operations are implied.
From the tool's definition Tool name 'list_agent_runtimes' uses the 'list' verb, which typically indicates a retrieval operation that queries and returns data without modification. The empty description provides no contradictory evidence.
Documented attack patterns abuse exactly the kind of access list_agent_runtimes 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_agent_runtimes:
{
"version": "1",
"default": "deny",
"tools": {
"list_agent_runtimes": {}
}
}list_agent_runtimes is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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list_agent_runtimes. 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_agent_runtimes: 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_agent_runtimes 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_runtimes 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_runtimes. 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_runtimes 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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805 Awslabs Amazon Sns Sqs tools catalogued and risk-classified — across an index of 43,000+ MCP servers.