AI agents call list_app_schedules 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 tool name indicates listing or retrieving application schedules, which is consistent with a Read operation (querying data without modification). The empty description lowers confidence slightly, but the 'list_' prefix strongly suggests a non-destructive retrieval. No evidence of data mutation, deletion, or execution of arbitrary code. Low severity due to the benign nature of schedule enumeration.
From the tool's definition Tool name 'list_app_schedules' and context of an SNS/SQS messaging service server suggest a query/retrieval operation. The empty description prevents definitive assessment, but 'list' is a retrieval verb with no side effects.
Documented attack patterns abuse exactly the kind of access list_app_schedules 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_app_schedules:
{
"version": "1",
"default": "deny",
"tools": {
"list_app_schedules": {}
}
}list_app_schedules is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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list_app_schedules. 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_app_schedules: 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_app_schedules 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_app_schedules 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_app_schedules. 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_app_schedules 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.