myob_journal_prepare_create · MYOB Codex MCP: Risk & Policy

WHAT IT DOES

What myob_journal_prepare_create does on MYOB Codex MCP

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

WHY IT NEEDS A POLICY

Why myob_journal_prepare_create needs a policy

This tool prepares creation of general journal entries, which are financial records that modify accounting data. Journal entries directly affect financial records and account balances in an accounting system.

From the tool's definition Tool name contains 'prepare_create' indicating creation of journal entries; description states 'High-risk approval required' confirming it modifies financial data; server description notes 'mutating actions that require explicit approval before commit'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

myob_journal_prepare_create Rate-limited

myob_journal_prepare_create 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": {
    "myob_journal_prepare_create": {
      "limits": [
        {
          "counter": "myob_journal_prepare_create_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MYOB Codex MCP, so you can run agents against it safely.

FAQ

Questions about myob_journal_prepare_create

What does the myob_journal_prepare_create tool do? +

Prepare general journal creation. High-risk approval required. It is categorised as a Write tool in the MYOB Codex MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on myob_journal_prepare_create? +

Register the MYOB Codex MCP server in PolicyLayer and add a rule for myob_journal_prepare_create: 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 MYOB Codex MCP. Nothing to install.

What risk level is myob_journal_prepare_create? +

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

Can I rate-limit myob_journal_prepare_create? +

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

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

myob_journal_prepare_create is provided by the MYOB Codex MCP server (jaeko44/myob-codex-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.