MCP AI Bridge - GitHub Copilot validation error on homeyscript_run

[Robin_Gosselaar]

Hi,

I am experiencing an issue with MCP AI Bridge in VS Code using GitHub Copilot Chat and Claude Sonnet 4.6.

Environment:

- Homey Pro

- MCP AI Bridge v2.7.0

- VS Code (latest version)

- GitHub Copilot Chat

- Claude Sonnet 4.6

The MCP server starts successfully:

- Running

- 130 tools discovered

- 6 prompts discovered

Claude Desktop works correctly with the same MCP server and can control Homey devices.

However, GitHub Copilot Chat fails before answering any prompt, even a simple prompt such as:

hello

Error:

Failed to validate tool mcp_mcp_ai_bridge_homeyscript_run:

Error: tool parameters array type must have items

The error occurs before any tool is executed.

Could this be related to the HomeyScript tool schema or a recent GitHub Copilot MCP validation change?

Thanks!

[smarthomesven]

Please report your issue in the app topic:

[APP][Pro] MCP AI Bridge - Control Homey with any AI assistant (Claude, ChatGPT, Gemini, Copilot or Cursor) via the Model Context Protocol

MCP AI Bridge Control your Homey Pro with any AI assistant. Claude, ChatGPT, Gemini, Copilot or Cursor. Just ask in plain language. Talk to your Homey like you talk to a person. “Turn off the lights.” “Is the door still open?” “Set the heating to 21.” “Build me a flow for the porch light at sunset.” MCP AI Bridge lets your favorite AI assistant control your Homey Pro directly, in any language you speak. It runs locally on your Homey, works with every major assistant through the open M…

[weide43]

[APP][Pro] MCP AI Bridge - Control Homey with any AI assistant (Claude, ChatGPT, Gemini, Copilot or Cursor) via the Model Context Protocol

@Robin_Gosselaar Hi Robin, thanks for the excellent bug report, your diagnosis was spot on. It’s a real bug in 2.7.0, fixed in 2.7.1 (updating now). The new homeyscript_run tool had an array parameter (args) without an items schema. Strict MCP clients like VS Code / GitHub Copilot reject any array-typed parameter that has no items, and that rejection aborts discovery of the entire toolset, which is why Copilot failed before answering even “hello”. Claude Desktop is more lenient about the schem…