We cannot directly use the result of vscode.lm.tools.find with vscode.lm.invokeTool because the types LanguageModelChatTool and LanguageModelToolInformation are incompatible.

@tamuratak Do you have a more complete sample that clarifies how invokeTool and picking from lm.tools interact? When invoking a tool you shouldn't use the inputSchema but an input-object with actual values

My comment was incorrect. It should have been LanguageModelChat.sendRequest, not invokeTool. The following is the actual code:

        const tools = getLmTools()
        const chatResponse = await model.sendRequest(
            messages, { tools }, token
        ).then(r => r, e => {

https://github.com/tamuratak/vscode-able/blob/73d0923492dc84167a3f62fb794e1dcdc1860f21/src/chat/chatlib/copilotchathandler.ts#L34

In my code, the getLmTools function transforms LanguageModelToolInformation[] to LanguageModelChatTool[]. Without that, we have

src/chat/chatlib/copilotchathandler.ts:35:25 - error TS2322: Type 'LanguageModelToolInformation[]' is not assignable to type 'LanguageModelChatTool[]'.
  Type 'LanguageModelToolInformation' is not assignable to type 'LanguageModelChatTool' with 'exactOptionalPropertyTypes: true'. Consider adding 'undefined' to the types of the target's properties.
    Types of property 'inputSchema' are incompatible.
      Type 'object | undefined' is not assignable to type 'object'.
        Type 'undefined' is not assignable to type 'object'.

35             messages, { tools }, token

Ok, that makes more sense. Thanks for clarifying!