From f49260e05c5d36b85066caf299fda9346b6ff788 Mon Sep 17 00:00:00 2001
From: Google Team Member <genai-sdk-bot@google.com>
Date: Thu, 15 Jan 2026 04:29:25 -0800
Subject: [PATCH] fix: fix linter error

PiperOrigin-RevId: 856603002
---
 .../java/com/google/adk/a2a/A2ASendMessageExecutor.java    | 2 +-
 .../java/com/google/adk/a2a/converters/PartConverter.java  | 1 +
 .../main/java/com/google/adk/tools/NamedToolPredicate.java | 7 ++++---
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/a2a/src/main/java/com/google/adk/a2a/A2ASendMessageExecutor.java b/a2a/src/main/java/com/google/adk/a2a/A2ASendMessageExecutor.java
index 47d3e402c..bd345ab22 100644
--- a/a2a/src/main/java/com/google/adk/a2a/A2ASendMessageExecutor.java
+++ b/a2a/src/main/java/com/google/adk/a2a/A2ASendMessageExecutor.java
@@ -201,7 +201,7 @@ private static Message errorResponse(String msg, String contextId) {
         new Message.Builder()
             .messageId(UUID.randomUUID().toString())
             .role(Message.Role.AGENT)
-            .parts(List.of(new TextPart("Error: " + msg)))
+            .parts(ImmutableList.of(new TextPart("Error: " + msg)))
             .build();
     if (contextId != null && !contextId.isEmpty()) {
       error.setContextId(contextId);
diff --git a/a2a/src/main/java/com/google/adk/a2a/converters/PartConverter.java b/a2a/src/main/java/com/google/adk/a2a/converters/PartConverter.java
index bac48f9a1..ba60ac43c 100644
--- a/a2a/src/main/java/com/google/adk/a2a/converters/PartConverter.java
+++ b/a2a/src/main/java/com/google/adk/a2a/converters/PartConverter.java
@@ -253,6 +253,7 @@ public static Optional<io.a2a.spec.Part<?>> fromGenaiPart(Part part) {
     return Optional.empty();
   }
 
+  @SuppressWarnings("unchecked") // safe conversion from OBJECT_MAPPER.readValue
   private static Map<String, Object> coerceToMap(Object value) {
     if (value == null) {
       return new HashMap<>();
diff --git a/core/src/main/java/com/google/adk/tools/NamedToolPredicate.java b/core/src/main/java/com/google/adk/tools/NamedToolPredicate.java
index f943de36b..94474fd30 100644
--- a/core/src/main/java/com/google/adk/tools/NamedToolPredicate.java
+++ b/core/src/main/java/com/google/adk/tools/NamedToolPredicate.java
@@ -1,19 +1,20 @@
 package com.google.adk.tools;
 
 import com.google.adk.agents.ReadonlyContext;
+import com.google.common.collect.ImmutableList;
 import java.util.List;
 import java.util.Optional;
 
 public class NamedToolPredicate implements ToolPredicate {
 
-  private final List<String> toolNames;
+  private final ImmutableList<String> toolNames;
 
   public NamedToolPredicate(List<String> toolNames) {
-    this.toolNames = List.copyOf(toolNames);
+    this.toolNames = ImmutableList.copyOf(toolNames);
   }
 
   public NamedToolPredicate(String... toolNames) {
-    this.toolNames = List.of(toolNames);
+    this.toolNames = ImmutableList.copyOf(toolNames);
   }
 
   @Override