setup_spf · Domain Suite MCP: Risk & Policy

WHAT IT DOES

What setup_spf does on Domain Suite

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

WHY IT NEEDS A POLICY

Why setup_spf needs a policy

SPF (Sender Policy Framework) record modification is a Write action because it creates or modifies DNS authentication records. While it affects email deliverability and authentication, it is reversible and does not irreversibly delete data or execute arbitrary code.

From the tool's definition The tool 'setup_spf' adds (creates/modifies) an SPF record, which is a DNS record used for email authentication. SPF records are reversible configurations that can be updated or removed without permanent data loss, classifying this as a Write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

setup_spf Rate-limited

setup_spf 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": {
    "setup_spf": {
      "limits": [
        {
          "counter": "setup_spf_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 Domain Suite, so you can run agents against it safely.

FAQ

Questions about setup_spf

What does the setup_spf tool do? +

Add SPF record with mail provider template. It is categorised as a Write tool in the Domain Suite MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on setup_spf? +

Register the Domain Suite MCP server in PolicyLayer and add a rule for setup_spf: 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 Domain Suite. Nothing to install.

What risk level is setup_spf? +

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

Can I rate-limit setup_spf? +

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

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

setup_spf is provided by the Domain Suite MCP server (oso95/domain-suite-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.