solidity agent pattern

Agent.sol

pragma solidity ^0.4.23;

import "./MyToken.sol";

contract Agent {
  MyToken token;
  
  constructor(MyToken _token) public {
    token = _token
  }

  function transferTokens(address _to, address _from, uint256 _value) public {
    MyToken(token).transfer(_to, _from, _value);
  }
}

MyToken.sol

pragma solidity ^0.4.23;

import "./Ownable.sol";

contract MyToken is Ownable {
    /* This creates an array with all balances */
    mapping (address => uint256) public balanceOf;
    
    address public agent;

    modifier onlyAgent {
      require(msg.sender == agent);
      _;
    }

    setAgent(address _agent) public onlyOwner {
        agent = _agent;
    }

    /* Send coins */
    function transfer(address _to, address _from, uint256 _value) public onlyAgent {
        require(balanceOf[_from] >= _value);           // Check if the sender has enough
        require(balanceOf[_to] + _value >= balanceOf[_to]); // Check for overflows
        balanceOf[_from] -= _value;                    // Subtract from the sender
        balanceOf[_to] += _value;                           // Add the same to the recipient
    }
}