AI agents invoke stop_scan to trigger actions in Awslabs Amazon Sns Sqs. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
Stopping a security scan is an Execute action because it triggers an external operation (halting a running process) whose effects depend on context—stopping a critical security scan could disrupt important auditing or compliance activities. While not destructive (the scan data is not deleted) and not a permanent modification, it actively terminates a process.
From the tool's definition Tool name 'stop_scan' indicates termination of an active process. The description states 'Stop a running security scan,' which is an operational action that interrupts an ongoing operation.
Documented attack patterns abuse exactly the kind of access stop_scan 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 stop_scan:
{
"version": "1",
"default": "deny",
"tools": {
"stop_scan": {
"limits": [
{
"counter": "stop_scan_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}stop_scan stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
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Stop a running security scan. It is categorised as a Execute tool in the Awslabs Amazon Sns Sqs MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Awslabs Amazon Sns Sqs MCP server in PolicyLayer and add a rule for stop_scan: 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.
stop_scan is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the stop_scan 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 stop_scan. 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.
stop_scan 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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