create_followup · Rentalot MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_followup does on Rentalot MCP Server

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

WHY IT NEEDS A POLICY

Why create_followup needs a policy

This tool creates a new scheduling record (a follow-up message) that modifies system state reversibly. It does not execute arbitrary code, delete data, move money, or read without side effects. The 'medium' severity reflects that a misused tool could spam contacts with unwanted automated messages, but the impact is limited to message scheduling rather than direct financial, destructive, or operational consequences.

From the tool's definition Tool description explicitly states 'Write operation' and 'schedule a follow-up message for a contact. The follow-up will be automatically sent at the scheduled time.' This creates a new scheduled message object.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_followup Rate-limited

create_followup 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_followup": {
      "limits": [
        {
          "counter": "create_followup_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 Rentalot MCP Server, so you can run agents against it safely.

FAQ

Questions about create_followup

What does the create_followup tool do? +

Use to schedule a follow-up message for a contact. The follow-up will be automatically sent at the scheduled time. Write operation — requires Pro tier or higher. It is categorised as a Write tool in the Rentalot 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 create_followup? +

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

What risk level is create_followup? +

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

Can I rate-limit create_followup? +

Yes. Add a rate_limit block to the create_followup 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_followup completely? +

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

create_followup is provided by the Rentalot MCP Server MCP server (rentalot-ai/rentalot-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.