review_session · Rentalot MCP Server MCP: Risk & Policy

WHAT IT DOES

What review_session does on Rentalot MCP Server

AI agents use review_session 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 review_session needs a policy

This tool creates or modifies data reversibly by changing the status/approval state of a workflow session. It does not execute arbitrary code, delete data irreversibly, or move money. The reversible nature of approval/denial decisions and the write-class categorization in the description place it in Write.

From the tool's definition The tool description explicitly states 'Write operation' and the name 'review_session' with 'approve or deny a workflow session' indicates state modification of a session object.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

review_session Rate-limited

review_session 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": {
    "review_session": {
      "limits": [
        {
          "counter": "review_session_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 review_session

What does the review_session tool do? +

Use to approve or deny a workflow session. 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 review_session? +

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

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

Can I rate-limit review_session? +

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

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

review_session 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.