Fix unmarshalling issues and adjust logging for debugging

Modify `FunctionCall` struct to handle arguments as strings. Add debugging logs to facilitate error tracing and improve JSON unmarshalling in various functions.

toolbox.go

@@ -2,11 +2,9 @@ package go_llm
 
 import (
 	"context"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"github.com/sashabaranov/go-openai"
-	"log/slog"
 )
 
 // ToolBox is a collection of tools that OpenAI can use to execute functions.
@@ -69,8 +67,6 @@ var (
 func (t *ToolBox) ExecuteFunction(ctx context.Context, functionName string, params string) (string, error) {
 	f, ok := t.names[functionName]
 
-	slog.Info("functionName", functionName)
-
 	if !ok {
 		return "", newError(ErrFunctionNotFound, fmt.Errorf("function \"%s\" not found", functionName))
 	}
@@ -79,12 +75,5 @@ func (t *ToolBox) ExecuteFunction(ctx context.Context, functionName string, para
 }
 
 func (t *ToolBox) Execute(ctx context.Context, toolCall ToolCall) (string, error) {
-	slog.Info("toolCall", toolCall)
-
-	b, err := json.Marshal(toolCall.FunctionCall.Arguments)
-
-	if err != nil {
-		return "", fmt.Errorf("failed to marshal arguments: %w", err)
-	}
-	return t.ExecuteFunction(ctx, toolCall.ID, string(b))
+	return t.ExecuteFunction(ctx, toolCall.FunctionCall.Name, toolCall.FunctionCall.Arguments)
 }