attach_to_instance

A write tool on the Vultr MCP server.

SERVERVultr MCP SOURCErsp2k/mcp-vultr

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/rsp2k-mcp-vultr/attach-to-instance.md

WHAT IT DOES

What attach_to_instance does on Vultr MCP

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

RISK

Why attach_to_instance is rated Medium

Attaching resources to instances modifies infrastructure configuration but is reversible (resources can be detached). This is a Write operation rather than Execute because it configures resources rather than running arbitrary operations, and it's not Destructive since detachment is possible.

From the tool's definition Tool name 'attach_to_instance' indicates modifying instance configuration by attaching resources (volumes, networks, etc.). The empty description limits certainty, but the verb 'attach' is consistently a reversible Write operation in infrastructure contexts.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs attach_to_instance safely

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

attach_to_instance Rate-limited

attach_to_instance 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": {
    "attach_to_instance": {
      "limits": [
        {
          "counter": "attach_to_instance_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 Vultr MCP, apply this rule, and every attach_to_instance call is checked against it from then on.

FAQ

Questions about attach_to_instance

What does the attach_to_instance tool do? +

attach_to_instance is a write tool on the Vultr MCP server. It is categorised as a Write tool in the Vultr MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on attach_to_instance? +

Register the Vultr MCP server in PolicyLayer and add a rule for attach_to_instance: 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 Vultr MCP. Nothing to install.

What risk level is attach_to_instance? +

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

Can I rate-limit attach_to_instance? +

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

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

attach_to_instance is provided by the Vultr MCP server (rsp2k/mcp-vultr). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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