Create a new cloud backup task
AI agents use cloud_backup_create to create or update resources in Truenas — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Truenas environment.
This tool creates a new cloud backup task, which is a write operation that modifies system state by establishing a new backup configuration. While it doesn't delete or execute arbitrary code, it creates a persistent backup task that could be configured to backup sensitive data or large volumes, making it high severity. The impact is reversible (the task can be deleted), placing it in Write rather than Destructive.
From the tool's definition Tool name 'cloud_backup_create' and description 'Create a new cloud backup task' indicate creation of a new backup configuration/task.
Documented attack patterns abuse exactly the kind of access cloud_backup_create gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Truenas, and nothing reaches the server without passing your rules. This is the rule we recommend for cloud_backup_create:
{
"version": "1",
"default": "deny",
"tools": {
"cloud_backup_create": {
"limits": [
{
"counter": "cloud_backup_create_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}cloud_backup_create stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Create a new cloud backup task. It is categorised as a Write tool in the Truenas MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Truenas MCP server in PolicyLayer and add a rule for cloud_backup_create: 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 Truenas. Nothing to install.
cloud_backup_create is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the cloud_backup_create 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 cloud_backup_create. 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.
cloud_backup_create is provided by the Truenas MCP server (spranab/truenas-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Truenas, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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279 Truenas tools catalogued and risk-classified — across an index of 43,000+ MCP servers.