AI agents invoke restart_stack to trigger actions in Komodo. 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.
Restarting a stack is an Execute action—it runs an operation with external effects that depend on which stack is targeted. It can cause service disruptions or downtime but is not Destructive (reversible by restarting again) or Financial. The high severity reflects that unintended stack restarts could disrupt production environments and dependent services.
From the tool's definition Tool name 'restart_stack' combined with server's capability to 'Manage Komodo DevOps platform resources (servers, containers, stacks, builds)' indicates this triggers external operations that restart infrastructure stacks.
Documented attack patterns abuse exactly the kind of access restart_stack gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Komodo, and nothing reaches the server without passing your rules. This is the rule we recommend for restart_stack:
{
"version": "1",
"default": "deny",
"tools": {
"restart_stack": {
"limits": [
{
"counter": "restart_stack_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}restart_stack 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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restart_stack. It is categorised as a Execute tool in the Komodo MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Komodo MCP server in PolicyLayer and add a rule for restart_stack: 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 Komodo. Nothing to install.
restart_stack 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 restart_stack 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 restart_stack. 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.
restart_stack is provided by the Komodo MCP server (myrikld/komodo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Komodo, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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53 Komodo tools catalogued and risk-classified — across an index of 43,000+ MCP servers.