Invalid schema for function 'mcp_tiger_db_execute_query'

[timdbie]

When using the TigerMCP through VSCode Copilot for example I get the following error.

Sorry, your request failed. Please try again.

Copilot Request id: 10bdb636-7d30-46e4-bc8a-d1e98c8cc12f

GH Request Id: 2588:5ADEE:221ABB:2692C8:691DA887

Reason: Request Failed: 400 {"error":{"message":"Invalid schema for function 'mcp_tiger_db_execute_query': In context=('properties', 'parameters'), array schema items is not an object.","code":"invalid_request_body"}}

The error is caused by the db_execute_query function, which only seems to work properly when selecting Claude models. Models like GPT get this error, unless the db_execute_query function is disabled.

It seems like the way Claude handles tool calling works with the MCP, but others do not.

[timdbie]

It appears to work now for GPT in Copilot with the latest code, so in my case it's solved.

Gemini still seems to fail through Copilot, so there might be another issue for this model.

Thanks!

[nathanjcochran]

Great! Glad to hear the fix is working for you 👍.

We just released v0.17.0, which includes the change from #110, which is the main fix for the issue you reported above. It also includes #114, which is another fix for a JSON schema issue that was preventing the MCP server from working with some models/providers.

We are going to continue testing and investigating bugs with other models/providers (I will test Gemini with Copilot later today), but in the meantime I am going to close this PR, since it seems like your primary issue has been fixed.

Thanks for the bug report! Really appreciate it 🙏.