unarchive_conversation · Codex Chats MCP: Risk & Policy

WHAT IT DOES

What unarchive_conversation does on Codex Chats

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

WHY IT NEEDS A POLICY

Why unarchive_conversation needs a policy

The tool changes the archival state of a conversation, which is a reversible metadata modification (not a permanent deletion). This qualifies as Write rather than Read (which would be retrieval-only) or Destructive (which would involve irreversible deletion).

From the tool's definition Unarchive a regular ChatGPT conversation (return to Recents) — modifies the state/metadata of a conversation by changing its archive status from archived to active/recent.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

unarchive_conversation Rate-limited

unarchive_conversation 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": {
    "unarchive_conversation": {
      "limits": [
        {
          "counter": "unarchive_conversation_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 Codex Chats, so you can run agents against it safely.

FAQ

Questions about unarchive_conversation

What does the unarchive_conversation tool do? +

Unarchive a regular ChatGPT conversation (return to Recents). It is categorised as a Write tool in the Codex Chats MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on unarchive_conversation? +

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

What risk level is unarchive_conversation? +

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

Can I rate-limit unarchive_conversation? +

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

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

unarchive_conversation is provided by the Codex Chats MCP server (shoyu-ramen/codex-chats-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.