update_vpc · CloudStack MCP Server MCP: Risk & Policy

WHAT IT DOES

What update_vpc does on CloudStack MCP Server

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

WHY IT NEEDS A POLICY

Why update_vpc needs a policy

This tool modifies VPC properties in a CloudStack infrastructure environment. While changes to network configuration can have significant blast radius (affecting connectivity, security groups, routing, etc.), the operation is reversible and does not destroy data or irreversibly alter infrastructure state.

From the tool's definition Tool name 'update_vpc' and description 'Update VPC properties' indicate modification of Virtual Private Cloud configuration. The verb 'update' signifies reversible changes to existing resources rather than deletion or creation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_vpc Rate-limited

update_vpc 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": {
    "update_vpc": {
      "limits": [
        {
          "counter": "update_vpc_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches CloudStack MCP Server, so you can run agents against it safely.

FAQ

Questions about update_vpc

What does the update_vpc tool do? +

Update VPC properties. It is categorised as a Write tool in the CloudStack 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 update_vpc? +

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

What risk level is update_vpc? +

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

Can I rate-limit update_vpc? +

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

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

update_vpc is provided by the CloudStack MCP Server MCP server (mozg31337/cloudstack-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.