diff --git a/src/crewai/lite_agent.py b/src/crewai/lite_agent.py
index c65c0c155..603823b4d 100644
--- a/src/crewai/lite_agent.py
+++ b/src/crewai/lite_agent.py
@@ -40,7 +40,7 @@ from crewai.events.types.logging_events import AgentLogsExecutionEvent
 from crewai.flow.flow_trackable import FlowTrackable
 from crewai.llm import LLM
 from crewai.llms.base_llm import BaseLLM
-from crewai.task import TaskOutput
+from crewai.tasks import TaskOutput
 from crewai.tools.base_tool import BaseTool
 from crewai.tools.structured_tool import CrewStructuredTool
 from crewai.utilities import I18N
@@ -217,7 +217,10 @@ class LiteAgent(FlowTrackable, BaseModel):
     @model_validator(mode="after")
     def ensure_guardrail_is_callable(self) -> Self:
         if callable(self.guardrail):
-            self._guardrail = self.guardrail
+            self._guardrail = cast(
+                Callable[[LiteAgentOutput | TaskOutput], tuple[bool, Any]],
+                self.guardrail,
+            )
         elif isinstance(self.guardrail, str):
             from crewai.tasks.llm_guardrail import LLMGuardrail
 
@@ -226,7 +229,10 @@ class LiteAgent(FlowTrackable, BaseModel):
                     f"Guardrail requires LLM instance of type BaseLLM, got {type(self.llm).__name__}"
                 )
 
-            self._guardrail = LLMGuardrail(description=self.guardrail, llm=self.llm)
+            self._guardrail = cast(
+                Callable[[LiteAgentOutput | TaskOutput], tuple[bool, Any]],
+                LLMGuardrail(description=self.guardrail, llm=self.llm),
+            )
 
         return self
 
diff --git a/src/crewai/tools/tool_usage.py b/src/crewai/tools/tool_usage.py
index 5f01b0b6d..004766514 100644
--- a/src/crewai/tools/tool_usage.py
+++ b/src/crewai/tools/tool_usage.py
@@ -165,7 +165,7 @@ class ToolUsage:
         """
         if self._check_tool_repeated_usage(calling=calling):
             try:
-                result = self._i18n.errors("task_repeated_usage").format(
+                repeated_usage_msg = self._i18n.errors("task_repeated_usage").format(
                     tool_names=self.tools_names
                 )
                 self._telemetry.tool_repeated_usage(
@@ -173,8 +173,8 @@ class ToolUsage:
                     tool_name=tool.name,
                     attempts=self._run_attempts,
                 )
-                result = self._format_result(result=result)
-                return result
+                repeated_usage_result = self._format_result(result=repeated_usage_msg)
+                return repeated_usage_result
 
             except Exception:
                 if self.task:
@@ -303,7 +303,7 @@ class ToolUsage:
             attempts=self._run_attempts,
         )
         result = self._format_result(result=result)
-        data = {
+        data: dict[str, Any] = {
             "result": result,
             "tool_name": tool.name,
             "tool_args": calling.arguments,