update_showing · Rentalot MCP Server MCP: Risk & Policy

WHAT IT DOES

What update_showing does on Rentalot MCP Server

AI agents use update_showing 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 update_showing needs a policy

This tool modifies showing data (a business-critical rental property resource), which is a reversible write operation. While not destructive, it could impact business operations if misused (e.g., changing showing times, availability). The severity is medium because updates to showings affect scheduling and customer experience, but the change is reversible and doesn't involve financial transactions or code execution.

From the tool's definition Tool name 'update_showing' and description 'Use to update a showing' indicate modification of existing showing records without deletion or reversal barriers.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_showing Rate-limited

update_showing 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_showing": {
      "limits": [
        {
          "counter": "update_showing_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 update_showing

What does the update_showing tool do? +

Use to update a showing. 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 update_showing? +

Register the Rentalot MCP Server MCP server in PolicyLayer and add a rule for update_showing: 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 update_showing? +

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

Can I rate-limit update_showing? +

Yes. Add a rate_limit block to the update_showing 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_showing completely? +

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

update_showing 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.