mcp-config-set mcp-exec errors - Github Copilot (OpenAI & Gemini) models

[shashanknimje]

Below errors occur when using OpenAI and Google models via GitHub Copilot Chat:

Models encountering these errors:

• OpenAI models: gpt-4.1, gpt-4o, gpt-5 mini, Raptor mini, gpt-5.1-codex, gpt-5.1-codex-mini, gpt-5

• 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:

Sorry, your request failed. Please try again.

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:

Sorry, your request failed. Please try again.

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.

[slimslenderslacks]

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]

Sounds great @slimslenderslacks . Thank you very much!