diff --git a/lib/crewai/src/crewai/agent/core.py b/lib/crewai/src/crewai/agent/core.py
index 21edbd160..9c9b43c06 100644
--- a/lib/crewai/src/crewai/agent/core.py
+++ b/lib/crewai/src/crewai/agent/core.py
@@ -1156,11 +1156,15 @@ class Agent(BaseAgent):
         # Process platform apps and MCP tools
         if self.apps:
             platform_tools = self.get_platform_tools(self.apps)
-            if platform_tools and self.tools is not None:
+            if platform_tools:
+                if self.tools is None:
+                    self.tools = []
                 self.tools.extend(platform_tools)
         if self.mcps:
             mcps = self.get_mcp_tools(self.mcps)
-            if mcps and self.tools is not None:
+            if mcps:
+                if self.tools is None:
+                    self.tools = []
                 self.tools.extend(mcps)
 
         # Prepare tools
diff --git a/uv.lock b/uv.lock
index 55db75b2c..a1850ebe9 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1197,7 +1197,7 @@ requires-dist = [
     { name = "crewai-files", marker = "extra == 'file-processing'", editable = "lib/crewai-files" },
     { name = "crewai-tools", marker = "extra == 'tools'", editable = "lib/crewai-tools" },
     { name = "docling", marker = "extra == 'docling'", specifier = "~=2.75.0" },
-    { name = "google-genai", marker = "extra == 'google-genai'", specifier = "~=1.49.0" },
+    { name = "google-genai", marker = "extra == 'google-genai'", specifier = "~=1.65.0" },
     { name = "httpx", specifier = "~=0.28.1" },
     { name = "httpx-auth", marker = "extra == 'a2a'", specifier = "~=0.23.1" },
     { name = "httpx-sse", marker = "extra == 'a2a'", specifier = "~=0.4.0" },
@@ -2249,6 +2249,11 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/83/1d/d6466de3a5249d35e832a52834115ca9d1d0de6abc22065f049707516d47/google_auth-2.48.0-py3-none-any.whl", hash = "sha256:2e2a537873d449434252a9632c28bfc268b0adb1e53f9fb62afc5333a975903f", size = 236499, upload-time = "2026-01-26T19:22:45.099Z" },
 ]
 
+[package.optional-dependencies]
+requests = [
+    { name = "requests" },
+]
+
 [[package]]
 name = "google-cloud-vision"
 version = "3.12.1"
@@ -2267,21 +2272,23 @@ wheels = [
 
 [[package]]
 name = "google-genai"
-version = "1.49.0"
+version = "1.65.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "anyio" },
-    { name = "google-auth" },
+    { name = "distro" },
+    { name = "google-auth", extra = ["requests"] },
     { name = "httpx" },
     { name = "pydantic" },
     { name = "requests" },
+    { name = "sniffio" },
     { name = "tenacity" },
     { name = "typing-extensions" },
     { name = "websockets" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/82/49/1a724ee3c3748fa50721d53a52d9fee88c67d0c43bb16eb2b10ee89ab239/google_genai-1.49.0.tar.gz", hash = "sha256:35eb16023b72e298571ae30e919c810694f258f2ba68fc77a2185c7c8829ad5a", size = 253493, upload-time = "2025-11-05T22:41:03.278Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/79/f9/cc1191c2540d6a4e24609a586c4ed45d2db57cfef47931c139ee70e5874a/google_genai-1.65.0.tar.gz", hash = "sha256:d470eb600af802d58a79c7f13342d9ea0d05d965007cae8f76c7adff3d7a4750", size = 497206, upload-time = "2026-02-26T00:20:33.824Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/d5/d3/84a152746dc7bdebb8ba0fd7d6157263044acd1d14b2a53e8df4a307b6b7/google_genai-1.49.0-py3-none-any.whl", hash = "sha256:ad49cd5be5b63397069e7aef9a4fe0a84cbdf25fcd93408e795292308db4ef32", size = 256098, upload-time = "2025-11-05T22:41:01.429Z" },
+    { url = "https://files.pythonhosted.org/packages/68/3c/3fea4e7c91357c71782d7dcaad7a2577d636c90317e003386893c25bc62c/google_genai-1.65.0-py3-none-any.whl", hash = "sha256:68c025205856919bc03edb0155c11b4b833810b7ce17ad4b7a9eeba5158f6c44", size = 724429, upload-time = "2026-02-26T00:20:32.186Z" },
 ]
 
 [[package]]