feat(ai): Improved error handling upon tool execution faiulre

Author: ThomasVitale

Diff for: arconia-ai/arconia-ai-tools/src/main/java/io/arconia/ai/tools/execution/ToolExecutionException.java

@@ -10,7 +10,7 @@ public class ToolExecutionException extends RuntimeException {
     private final ToolDefinition toolDefinition;
 
     public ToolExecutionException(ToolDefinition toolDefinition, Throwable cause) {
-        super(cause.getMessage(), cause);
+        super("Tool execution error - %s".formatted(cause.getMessage()), cause);
         this.toolDefinition = toolDefinition;
     }
 

Diff for: arconia-ai/arconia-ai-tools/src/test/java/io/arconia/ai/tools/execution/ToolExecutionExceptionTests.java

@@ -19,7 +19,7 @@ void constructorShouldSetCauseAndMessage() {
         ToolExecutionException exception = new ToolExecutionException(mock(ToolDefinition.class), cause);
 
         assertThat(exception.getCause()).isEqualTo(cause);
-        assertThat(exception.getMessage()).isEqualTo(errorMessage);
+        assertThat(exception.getMessage()).isEqualTo("Tool execution error - Test error message");
     }
 
     @Test

Diff for: arconia-ai/arconia-ai-tools/src/test/java/io/arconia/ai/tools/method/MethodToolCallbackTests.java

@@ -169,7 +169,8 @@ void shouldHandleMethodExecutionError() {
                 """);
 
         assertThat(result)
-            .contains("Test error");
+                .contains("Tool execution error")
+                .contains("Test error");
     }
 
     @Test