diff --git a/lib/galaxy/agents/custom_tool.py b/lib/galaxy/agents/custom_tool.py
index a251836cfdc..4c07b8afe60 100644
--- a/lib/galaxy/agents/custom_tool.py
+++ b/lib/galaxy/agents/custom_tool.py
@@ -111,7 +111,7 @@ class CustomToolAgent(BaseGalaxyAgent):
     def _create_agent(self) -> Agent[GalaxyAgentDependencies, Any]:
         """Create agent with UserToolSource as the output type.
 
-        Sets output_retries=0 because the agent's explicit reflection loop
+        Sets retries=0 because the agent's explicit reflection loop
         owns the validation retry (to provide a better prompt).
         """
         return Agent(
@@ -119,7 +119,7 @@ class CustomToolAgent(BaseGalaxyAgent):
             deps_type=GalaxyAgentDependencies,
             output_type=UserToolSource,
             system_prompt=self.get_system_prompt(),
-            output_retries=0,
+            retries=0,
         )
 
     def get_system_prompt(self) -> str:
diff --git a/lib/galaxy/dependencies/pinned-requirements.txt b/lib/galaxy/dependencies/pinned-requirements.txt
index 99fef523a9d..1889a903d32 100644
--- a/lib/galaxy/dependencies/pinned-requirements.txt
+++ b/lib/galaxy/dependencies/pinned-requirements.txt
@@ -203,11 +203,11 @@ pyasn1-modules==0.4.2
 pycparser==3.0 ; (implementation_name != 'PyPy' and platform_python_implementation != 'PyPy') or (implementation_name == 'pypy' and platform_python_implementation == 'PyPy')
 pycryptodome==3.23.0
 pydantic==2.13.4
-pydantic-ai==1.97.0
-pydantic-ai-slim==1.97.0
+pydantic-ai==1.99.0
+pydantic-ai-slim==1.99.0
 pydantic-core==2.46.4
-pydantic-evals==1.97.0
-pydantic-graph==1.97.0
+pydantic-evals==1.99.0
+pydantic-graph==1.99.0
 pydantic-handlebars==0.1.0
 pydantic-settings==2.14.1
 pydantic-tes==0.4.0