[BUG] SerperDevTool isn't working on the agent

[matthsena]

Description

I'm using SerperDevTool from crewai_tools on my agent, and i'm getting the follow error:

I encountered an error while trying to use the tool. This was the error: Arguments validation failed: 1 validation error for SerperDevToolSchema
>  search_query
>    Field required [type=missing, input_value={'description': "CNAE 're... pavimento asfáltico'"}, input_type=dict]
>      For further information visit https://errors.pydantic.dev/2.10/v/missing.
>   Tool Search the internet with Serper accepts these inputs: Tool Name: Search the internet with Serper
>  Tool Arguments: {'search_query': {'description': 'Mandatory search query you want to use to search the internet', 'type': 'str'}}
>  Tool Description: A tool that can be used to search the internet with a search_query. Supports different search types: 'search' (default), 'news'.
>  Moving on then. I MUST either use a tool (use one at time) OR give my best final answer not both at the same time. When responding, I must use the following format:```

but when I add this tool to the task "research_task", it works correctly. Shouldn't it work both ways?

### Steps to Reproduce

1. Import https://docs.crewai.com/tools/serperdevtool#serperdevtool
2.  Add this tool to  agent, something like this:
```python @agent
	def research_analyst(self) -> Agent:
		return Agent(
			config=self.agents_config['research_analyst'],
   			tools=[search_tool],
			llm=llm,
			verbose=True
		)

Expected behavior

It works by defining the tool in the agent, just like it works in the task

Screenshots/Code snippets

@CrewBase
class AgentCNAE():
	"""AgentCNAE crew"""

	agents_config = 'config/agents.yaml'
	tasks_config = 'config/tasks.yaml'

	@agent
	def pre_section_analyst(self) -> Agent:
		return Agent(
			config=self.agents_config['pre_section_analyst'],
			llm=llm,
			verbose=True
		)

	@agent
	def research_analyst(self) -> Agent:
		return Agent(
			config=self.agents_config['research_analyst'],
			llm=llm,
   			tools=[search_tool],
			verbose=True
		)
  
	@agent
	def cnae_checker_sheet(self) -> Agent:
		return Agent(
			config=self.agents_config['cnae_checker_sheet'],
   			tools=[CheckCNAE(result_as_answer=True)],
			llm=llm,
			verbose=True
		)  

	@task
	def preprocessing_task(self) -> Task:
		return Task(
			config=self.tasks_config['preprocessing_task'],
		)

	@task
	def research_task(self) -> Task:
		return Task(
			config=self.tasks_config['research_task'],
		)
  
	@task
	def check_cnae_task(self) -> Task:
		return Task(
			config=self.tasks_config['check_cnae_task'],
			output_json=CNAEResponse
		)  

	@crew
	def crew(self) -> Crew:
		"""Creates the AgentsLicitacaoAi crew"""
		return Crew(
			agents=self.agents,
			tasks=self.tasks,
			process=Process.sequential,
			verbose=True
		)

Operating System

Ubuntu 24.04

Python Version

3.11

crewAI Version

0.100.0

crewAI Tools Version

0.33.0

Virtual Environment

Venv

Evidence

Possible Solution

None

Additional context

None