Invalid Value: 'tools'. Function 'functions.spawn_agent' declares encrypted parameters but is not configured for encrypted tool use by this model. #27548

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1. m-mahadi

   added

   appIssues related to the Codex desktop appIssues related to the Codex desktop app

   on Jun 11, 2026
2. github-actions

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   bugSomething isn't workingSomething isn't working

   subagentIssues involving subagents or multi-agent featuresIssues involving subagents or multi-agent features

   on Jun 11, 2026
3. github-actions commented on Jun 11, 2026

   

   github-actionsBot

   on Jun 11, 2026 – with GitHub Actions

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   Potential duplicates detected. Please review them and close your issue if it is a duplicate.

   • 0.137.0 (ChatGPT account): multi_agent_v2 enabled in config.toml breaks every turn with spawn_agent encrypted-tools 400 #27331
   • Major Codex Desktop Regression Makes App Unusable. #27260
   • MultiAgentV2 encrypted spawn_agent schema returns 400: model not configured for encrypted tool use #26753
   • Invalid Value: 'tools'. Function 'functions.followup_task' declares encrypted parameters but is not configured for encrypted tool use by this model. #27205

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   👎React with 👎1Reacted by Jinbiao Yang
4. uhlhosting commented on Jun 11, 2026

   

   uhlhosting

   on Jun 11, 2026

   Last edited by uhlhosting

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   Same issue on MacOS. I disable all findings from other posts. It's in a loop! All was working fine on last release this must be a joke!

   Invalid Value: 'tools'. Function 'functions.spawn_agent' declares encrypted parameters but is not configured for encrypted tool use by this model.

   Invalid Value: 'tools'. Function 'functions.spawn_agent' declares encrypted parameters but is not configured for encrypted tool use by this model.

   Your workspace is out of credits. Add credits to continue. 0 Ignore this I have full tokens in this session!

   Invalid Value: 'tools'. Function 'functions.spawn_agent' declares encrypted parameters but is not configured for encrypted tool use by this model.

   Invalid Value: 'tools'. Function 'functions.spawn_agent' declares encrypted parameters but is not configured for encrypted tool use by this model.

   Invalid Value: 'tools'. Function 'functions.spawn_agent' declares encrypted parameters but is not configured for encrypted tool use by this model.

   Invalid Value: 'tools'. Function 'functions.spawn_agent' declares encrypted parameters but is not configured for encrypted tool use by this model.
5. m-mahadi commented on Jun 11, 2026

   

   m-mahadi

   on Jun 11, 2026

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   @uhlhosting bro in windows i tried these codex features disable multi_agent_v2
   codex features disable multi_agent in powershell and then in config.toml i changed to this [features]
   multi_agent = false
   multi_agent_v2 = false.

   👍React with 👍1Reacted by Viorel-Cosmin Miron
6. uhlhosting commented on Jun 11, 2026

   

   uhlhosting

   on Jun 11, 2026

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   @uhlhosting bro in windows i tried these codex features disable multi_agent_v2
   codex features disable multi_agent in powershell and then in config.toml i changed to this [features]
   multi_agent = false
   multi_agent_v2 = false.

   Hi will give it a try. For me it works partially. New tasks works. Old one cannot continue still.
7. ignatremizov commented on Jun 13, 2026

   

   ignatremizov

   on Jun 13, 2026

   Last edited by ignatremizov

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   This looks like the same issue tracked in #27205 / #27331, originally reported in #26753.

   Workaround for Codex App users:

   1. Quit Codex App completely.
   2. Edit your Codex config:

   # macOS/Linux: ~/.codex/config.toml
   # Windows: %USERPROFILE%\.codex\config.toml
   [features.multi_agent_v2]
   enabled = false

   3. Reopen Codex App and start a fresh thread/session.

   If an existing thread still fails after disabling it, the config change is not enough for that old thread. Some existing threads persist multi_agent_version = "v2" in rollout history, so resumed old threads can keep sending the encrypted spawn_agent / followup_task tool schema even after the feature is disabled. That persistence case is discussed in #27205.

   Separate but related: #26210 also made v2 subagent task/message data unreadable in rollouts, which makes these recovery/debugging cases harder. I opened #28058 for that auditability issue, please react if this affects you.
8. etraut-openai

   marked Codex no usable and all the threads are down with this error Invalid Value: 'tools'. Function 'functions.spawn_agent' declares encrypted parameters but is not configured for encrypted tool use by this model. #27622 as a duplicate of this issue on Aug 6, 2026