create_ptr_record · Spaceship MCP: Risk & Policy

WHAT IT DOES

What create_ptr_record does on Spaceship

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

WHY IT NEEDS A POLICY

Why create_ptr_record needs a policy

The tool creates DNS PTR records, which is a data modification operation. PTR records map IP addresses to hostnames and are used in reverse DNS lookups. Creating a PTR record modifies DNS infrastructure but is reversible (can be deleted/updated). This is less severe than Destructive (which cannot be undone) but more than Read.

From the tool's definition Tool name contains 'create_ptr_record'; description states it 'Create[s] a PTR record (reverse DNS pointer) for a domain.' This is a reversible write operation that modifies DNS infrastructure.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_ptr_record Rate-limited

create_ptr_record 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": {
    "create_ptr_record": {
      "limits": [
        {
          "counter": "create_ptr_record_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 Spaceship, so you can run agents against it safely.

FAQ

Questions about create_ptr_record

What does the create_ptr_record tool do? +

Create a PTR record (reverse DNS pointer) for a domain. It is categorised as a Write tool in the Spaceship MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_ptr_record? +

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

What risk level is create_ptr_record? +

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

Can I rate-limit create_ptr_record? +

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

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

create_ptr_record is provided by the Spaceship MCP server (naveenkm007/spaceship-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.