refactor: add reusable validation utilities for MCP tools

[KAishwarya2429]

This PR introduces reusable validation utilities for MCP tools.

Changes

• Added validation_utils.py for common validation logic
• Implemented validate_id and validate_required_fields
• Added unit tests for validation utilities

Purpose

• Reduce duplication across MCP tools
• Improve consistency in validation and error handling
• Enhance maintainability of the codebase

Looking forward to feedback!

[gyanLM10]

I also saw in the commit history something like “Add Smart Suggestion Engine for MCP tools” — this was already discussed in a previous PR, and the suggestion engine logic doesn’t belong in the MCP server layer.

[KAishwarya2429]

Hi @gyanLM10, thanks for reviewing!
I’ll check my commit history and ensure only validation utility changes are included in this PR. If any unrelated changes are present, I will remove them and update the PR accordingly.