fix: restore country, location, and language parameters to SerperDevTool

[theCyberTech]

This commit fixes issue #221 by:

• Restoring country, location, and locale properties to SerperDevTool class
• Adding optional parameters to SerperDevToolSchema for per-request configuration
• Enhancing _make_api_request to accept and use localization parameters
• Updating documentation with usage examples and parameter descriptions

The fix addresses the regression introduced in commit 55b6927 and restores the functionality that was previously available.

[joaomdmoura]

Disclaimer: This review was made by a crew of AI Agents.

Code Review Comment for PR #225: Enhancements and Restoration of Localization Parameters in SerperDevTool

Overview

This pull request adeptly addresses issue #221 by restoring and enhancing localization functionality within the SerperDevTool class. The changes made are generally well-structured and contribute positively to the tool's functionality, though there are several areas that would benefit from further refinement to improve code quality and maintainability.

Positive Aspects

1. Documentation updates in README.md are notably improved, providing clearer guidance on the new localization features.
2. The use of clear parameter naming and appropriate type hints is commendable, ensuring the code is self-explanatory.
3. Logical separation of concerns is evident, enhancing the clarity and manageability of the code.

Issues and Recommendations

1. Inconsistent Parameter Naming

There is a mix-up between terminology used for parameters:

• Current terminology:
  • locale is used in the class.
  • language appears in schemas and methods.

Recommendation: To eliminate confusion and improve consistency, unify the naming convention across the code:

class SerperDevToolSchema(BaseModel):
    locale: Optional[str] = Field(
        None, description="Optional two-letter locale code (e.g., 'en', 'es', 'fr') for results in specific language"
    )

2. Optional Parameter Handling

Using empty strings as defaults for optional parameters can lead to ambiguity.

Recommendation: Set optional parameters to None to better signify their optional status:

class SerperDevTool(BaseTool):
    country: Optional[str] = None
    location: Optional[str] = None
    locale: Optional[str] = None

3. Error Handling Enhancement

The _make_api_request method could benefit from better error management, enhancing robustness against API failures.

Recommendation: Implement structured error handling:

def _make_api_request(self, search_query: str, search_type: str, **kwargs) -> dict:
    try:
        # API request logic
    except requests.exceptions.RequestException as e:
        logging.error(f"API request failed: {str(e)}")
        raise ValueError(f"Failed to fetch search results: {str(e)}")

4. Parameter Validation

Validating input for parameters such as country and locale codes is essential to prevent errors.

Recommendation: Introduce validation to handle unsupported codes:

def _validate_parameters(self, country: Optional[str], locale: Optional[str]) -> None:
    # Validation logic goes here

5. Configuration Encapsulation

Consider introducing a configuration class to manage parameters effectively.

Recommendation:

class SerperConfig(BaseModel):
    country: Optional[str] = Field(None, description="Two-letter country code")
    # Other configuration fields

Documentation Suggestions

1. Provide examples of input validation.
2. Document error handling procedures.
3. List supported country and locale codes clearly.
4. Add guidelines concerning rate limiting.

Testing Recommendations

1. Develop unit tests targeting parameter validation.
2. Write integration tests for localization parameters.
3. Create tests for error handling scenarios.

Security Considerations

1. Ensure location input is sanitized.
2. Validate API key presence robustly.

While the current modifications effectively restore functionality, adopting these suggestions will enhance the overall quality, robustness, and user experience of the SerperDevTool. Thank you for your efforts on this PR!