---
title: "Discussion on \"Read-only Codex starts your MCP servers too. Disable them before the review.\" | Hashnode"
description: "Discussion on \"Read-only Codex starts your MCP servers too. Disable them before the review.\". A codex exec -s read-only review can't write files, and the MCP servers in your ~/.codex/config.toml start for it anyway. A server that can change things outside the sandbox works against a read-only"
url: "https://hashnode.com/posts/read-only-codex-starts-your-mcp-servers-too-disable-them-before-the-review/6af4127133a37333a44c366e"
---

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# [Read-only Codex starts your MCP servers too. Disable them before the review.](https://iliyaoblakov.hashnode.dev/read-only-codex-starts-your-mcp-servers-too-disable-them-before-the-review?utm_source=hashnode&utm_medium=feed)

A codex exec -s read-only review can't write files, and the MCP servers in your ~/.codex/config.toml start for it anyway. A server that can change things outside the sandbox works against a read-only

7h ago · 7 min read · iliyaoblakov.hashnode.dev  
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[Iliya Oblakov](https://hashnode.com/@iliyaoblakov)

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