cloudsync_run

THE RISK

High Risk

Why cloudsync_run needs a policy

This tool triggers execution of a cloud synchronization operation, which is an external action whose effects depend on the specific sync configuration. While not immediately destructive or financial, it performs I/O-heavy operations that transfer data to/from cloud storage, making it an Execute category risk.

From the tool's definition Tool name 'cloudsync_run' and description 'Run a cloud sync task now' indicate execution of a configured task that initiates data synchronization with external cloud services.

Documented attack patterns abuse exactly the kind of access cloudsync_run gives an agent:

POLICY

How to control cloudsync_run

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 cloudsync_run:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "cloudsync_run": {
      "limits": [
        {
          "counter": "cloudsync_run_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

cloudsync_run 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.

Create a free account and register Truenas — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

High-risk tools in Truenas → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about cloudsync_run

What does the cloudsync_run tool do? +

Run a cloud sync task now. It is categorised as a Execute tool in the Truenas MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on cloudsync_run? +

Register the Truenas MCP server in PolicyLayer and add a rule for cloudsync_run: 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.

What risk level is cloudsync_run? +

cloudsync_run is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit cloudsync_run? +

Yes. Add a rate_limit block to the cloudsync_run 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.

How do I block cloudsync_run completely? +

Set action: deny in the PolicyLayer policy for cloudsync_run. 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.

What MCP server provides cloudsync_run? +

cloudsync_run 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.

Enforce policy on every Truenas tool call.

Start from Truenas, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →