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mcp-config-set mcp-exec errors - Github Copilot (OpenAI & Gemini) models #275
Description
Below errors occur when using OpenAI and Google models via GitHub Copilot Chat:
Models encountering these errors:
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OpenAI models: gpt-4.1, gpt-4o, gpt-5 mini, Raptor mini, gpt-5.1-codex, gpt-5.1-codex-mini, gpt-5
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Gemini models: 2.5 Pro, 3 Pro
Note: No errors occur when using grok-code-fast-1, claude models.
When running with mcp-config-set (tool) enabled:
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Copilot Request id: 63d29ffa-df63-4755-9a65-60697cd4fc5b
GH Request Id: 4733:2D80D1:3271901:3A93020:69304EE1
Reason: Request Failed: 400 {"error":{"message":"Invalid schema for function 'mcp_mcp_docker_mcp-config-set': In context=('properties', 'value', 'type', '4'), array schema missing items.","code":"invalid_request_body"}}
When running with mcp-exec (tool) enabled:
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Copilot Request id: 371d8d7e-1076-440d-8700-a350bca94c0e
GH Request Id: 473D:5D47C:30297C8:385CF51:69304FAA
Reason: Request Failed: 400 {"error":{"message":"Invalid schema for function 'mcp_mcp_docker_mcp-exec': In context=('properties', 'arguments', 'type', '4'), array schema missing items.","code":"invalid_request_body"}}
Please let me know if I can share more information to help resolve these errors. Thank you.
Reacted by Demian Frister, Sean M. Hoffman and Kirill Serebriakov
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slimslenderslacks commentedon Dec 9, 2025
Hi @shashanknimje. For mcp-config-set, we're going to switch the input schema to be type=object. For mcp-exec, we'll also make the arguments property type=object. We're testing the catalog with gpt-4.1 and gemini 2.5 Pro to validate.
This is ready to go out in v0.33.0 so I'll close this when it's out. You'll have to to build from main or update Docker Desktop to get this fix but it will be available this week.
shashanknimje commentedon Dec 9, 2025
Sounds great @slimslenderslacks . Thank you very much!
masimjamil commentedon Dec 11, 2025
Just wondering if it's resolved now. I am still keep getting same error. Sometimes, it works fine and after certain time, all of sudden it start throwing an error.
shashanknimje commentedon Dec 11, 2025
@masimjamil it may be fixed in the next release (v0.33.0) perhaps.
shashanknimje commentedon Dec 12, 2025
Not sure if this is fixed in the newly released v0.33.0. But I am receiving these errors on both Linux and MacOS for the below models.
Gemini 2.5 & 3 Pro:
GPT-4.1, GPT-4o, GPT-5 mini, Raptor mini, GPT-5.1-Codex, GPT-5.1-Codex-Max, GPT-5.2:
Sorry, your request failed. Please try again. Copilot Request id: 86ff25bf-11e1-40b4-9d70-68fac040e376 GH Request Id: 1906:148940:24FF96:2A3446:693BF3D5 Reason: Request Failed: 400 {"error":{"message":"Invalid schema for function 'mcp_mcp_docker_mcp-config-set': In context=('properties', 'value', 'type', '4'), array schema missing items.","code":"invalid_request_body"}}shashanknimje commentedon Dec 18, 2025
Just wanted to give a quick update on this issue.
I'm not sure if the fix was made here or elsewhere (another repo?), but now all the GitHub Copilot models (Grok, Gemini, OpenAI, Anthropic, Microsoft) appear to be working with the
MCP_DOCKERmcp server tools (code-mode,mcp-add,mcp-config-set,mcp-create-profile,mcp-exec,mcp-find,mcp-remove) enabled.I am running
docker mcp v0.34.0andDocker Desktop v4.55.0on MacOS.VS Code Insiders Edition:
GitHub Copilot Chat (pre-release) VS Code Extension:
slimslenderslacks commentedon Jan 9, 2026
This is fixed in v0.35.0