manage_properties · Bookie MCP: Risk & Policy

WHAT IT DOES

What manage_properties does on Bookie

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

WHY IT NEEDS A POLICY

Why manage_properties needs a policy

This tool performs reversible modifications to rental property records in a financial accounting system. Creating and archiving properties are Write operations — they modify the property catalog that supports tax filing (Schedule E). While it affects financial records, it does not move money (Financial), delete irreversibly (Destructive), or execute arbitrary code (Execute).

From the tool's definition Tool description states 'Create, list, or archive rental properties' — create and archive are write operations that modify data structure and state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

manage_properties Rate-limited

manage_properties 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": {
    "manage_properties": {
      "limits": [
        {
          "counter": "manage_properties_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 Bookie, so you can run agents against it safely.

FAQ

Questions about manage_properties

What does the manage_properties tool do? +

Create, list, or archive rental properties. Schedule E is filed per property, so rental transactions are tagged with a propertyId (and optional unit) in add_transaction. Non-rental work doesn. It is categorised as a Write tool in the Bookie MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on manage_properties? +

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

What risk level is manage_properties? +

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

Can I rate-limit manage_properties? +

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

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

manage_properties is provided by the Bookie MCP server (yuens1002/bookie). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.