arvan_update_subnet

Update a subnet (e.g. dns_servers, enable_dhcp, subnet_gateway).

SERVERArvanCloud MCP Server SOURCEdwin-gharibi/arvancloud-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/dwin-gharibi-arvancloud-mcp/arvan-update-subnet.md

WHAT IT DOES

What arvan_update_subnet does on ArvanCloud MCP Server

AI agents use arvan_update_subnet to create or update resources in ArvanCloud MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your ArvanCloud MCP Server environment.

RISK

Why arvan_update_subnet is rated Medium

This tool modifies existing cloud network infrastructure (subnet settings) through configuration changes. While these changes are reversible (Write not Destructive), they affect critical networking infrastructure that could disrupt services if misconfigured by an agent.

From the tool's definition Updates a subnet's configuration parameters including dns_servers, enable_dhcp, and subnet_gateway. These are reversible modifications to network infrastructure.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs arvan_update_subnet safely

PolicyLayer is an MCP gateway: it sits between your AI agents and ArvanCloud MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For arvan_update_subnet, this is the rule to start with:

arvan_update_subnet Rate-limited

arvan_update_subnet 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "arvan_update_subnet": {
      "limits": [
        {
          "counter": "arvan_update_subnet_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect ArvanCloud MCP Server, apply this rule, and every arvan_update_subnet call is checked against it from then on.

FAQ

Questions about arvan_update_subnet

What does the arvan_update_subnet tool do? +

Update a subnet (e.g. dns_servers, enable_dhcp, subnet_gateway). It is categorised as a Write tool in the ArvanCloud MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on arvan_update_subnet? +

Register the ArvanCloud MCP Server MCP server in PolicyLayer and add a rule for arvan_update_subnet: 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 ArvanCloud MCP Server. Nothing to install.

What risk level is arvan_update_subnet? +

arvan_update_subnet is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit arvan_update_subnet? +

Yes. Add a rate_limit block to the arvan_update_subnet 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 arvan_update_subnet completely? +

Set action: deny in the PolicyLayer policy for arvan_update_subnet. 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 arvan_update_subnet? +

arvan_update_subnet is provided by the ArvanCloud MCP Server MCP server (dwin-gharibi/arvancloud-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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