neuron-tool-creator

name

neuron-tool-creator

description

Create custom tools and toolkits for Neuron AI agents. Use this skill whenever the user mentions tools, functions, capabilities, agent actions, building tools, extending agent functionality, or wants to add custom capabilities to Neuron agents. Also trigger for tasks involving tool properties, tool execution, toolkits, MCP connector, or any request to make an agent able to perform specific actions.

Neuron AI Tool Creator

This skill helps you create custom tools and toolkits for Neuron AI agents. Tools extend agent capabilities by allowing them to perform concrete actions like database queries, API calls, calculations, and more.

Tool Basics

A tool is a class that implements ToolInterface and defines:

1. Name - Unique identifier
2. Description - What the tool does (helps the AI know when to use it)
3. Properties - Parameters the tool accepts
4. Execute method - The actual logic

Creating a Simple Tool

use NeuronAI\Tools\Tool;
use NeuronAI\Tools\ToolProperty;
use NeuronAI\Tools\ToolPropertyType;

class WeatherTool extends Tool
{
    public function __construct()
    {
        parent::__construct(
            name: 'get_weather',
            description: 'Get the current weather for a specific location',
            properties: [
                new ToolProperty(
                    name: 'location',
                    type: ToolPropertyType::String,
                    description: 'The city name or zip code',
                    required: true,
                ),
            ],
        );
    }

    public function execute(array $arguments): mixed
    {
        $location = $arguments['location'];

        // Call weather API
        $weather = $this->fetchWeather($location);

        return [
            'location' => $location,
            'temperature' => $weather['temp'],
            'condition' => $weather['condition'],
            'humidity' => $weather['humidity'],
        ];
    }

    private function fetchWeather(string $location): array
    {
        // Weather API implementation
        return [
            'temp' => 72,
            'condition' => 'Sunny',
            'humidity' => 45,
        ];
    }
}

Tool Properties

Supported Property Types

use NeuronAI\Tools\ToolPropertyType;

new ToolProperty(
    name: 'query',
    type: ToolPropertyType::String,  // String, Number, Boolean, Array, Object
    description: 'The search query',
    required: true,
    default: null,
    enum: ['option1', 'option2'],  // Optional: restrict to these values
);

new ToolProperty(
    name: 'limit',
    type: ToolPropertyType::Number,
    description: 'Maximum results to return',
    required: false,
    default: 10,
    minimum: 1,
    maximum: 100,
);

new ToolProperty(
    name: 'options',
    type: ToolPropertyType::Array,
    description: 'List of options',
    required: true,
    items: ToolPropertyType::String,  // Type of array items
);

Object Properties

new ToolProperty(
    name: 'user_data',
    type: ToolPropertyType::Object,
    description: 'User information',
    required: true,
    properties: [
        new ToolProperty(
            name: 'name',
            type: ToolPropertyType::String,
            description: 'User name',
            required: true,
        ),
        new ToolProperty(
            name: 'age',
            type: ToolPropertyType::Number,
            description: 'User age',
            required: false,
        ),
    ],
);

Nested Properties

new ToolProperty(
    name: 'filters',
    type: ToolPropertyType::Object,
    description: 'Search filters',
    required: false,
    properties: [
        new ToolProperty(
            name: 'date_range',
            type: ToolPropertyType::Object,
            description: 'Date range filter',
            required: false,
            properties: [
                new ToolProperty(
                    name: 'start',
                    type: ToolPropertyType::String,
                    description: 'Start date (YYYY-MM-DD)',
                    required: true,
                ),
                new ToolProperty(
                    name: 'end',
                    type: ToolPropertyType::String,
                    description: 'End date (YYYY-MM-DD)',
                    required: true,
                ),
            ],
        ),
    ],
);

Tool Configuration

Visibility Control

class HiddenTool extends Tool
{
    public function __construct()
    {
        parent::__construct(
            name: 'internal_operation',
            description: 'Internal tool not exposed to users',
            properties: [],
            visible: false,  // Tool won't appear in function calling
        );
    }
}

Execution Limits

class LimitedTool extends Tool
{
    public function __construct()
    {
        parent::__construct(
            name: 'expensive_operation',
            description: 'A costly operation',
            properties: [],
            maxRuns: 1,  // Can only run once per conversation
        );
    }
}

Dependency Injection

class DatabaseTool extends Tool
{
    public function __construct(
        private \PDO $pdo
    ) {
        parent::__construct(
            name: 'query_database',
            description: 'Execute a SQL query on the database',
            properties: [
                new ToolProperty(
                    name: 'query',
                    type: ToolPropertyType::String,
                    description: 'The SQL query to execute',
                    required: true,
                ),
            ],
        );
    }

    public function execute(array $arguments): mixed
    {
        $stmt = $this->pdo->prepare($arguments['query']);
        $stmt->execute();
        return $stmt->fetchAll(\PDO::FETCH_ASSOC);
    }
}

Adding Tools to Agents

Single Tool

use NeuronAI\Agent;

class MyAgent extends Agent
{
    protected function tools(): array
    {
        return [
            new WeatherTool(),
        ];
    }
}

Multiple Tools

protected function tools(): array
{
    return [
        new WeatherTool(),
        new DatabaseTool(\DB::connection()->getPdo()),
        new CalculatorTool(),
    ];
}

Dynamic Tool Addition

$agent = MyAgent::make();
$agent->addTool(new CustomTool());

Creating Toolkits

A toolkit is a collection of related tools.

Basic Toolkit Pattern

use NeuronAI\Tools\Toolkit;

class EcommerceToolkit extends Toolkit
{
    public function __construct(
        private \PDO $pdo,
        private string $apiKey
    ) {}

    public function tools(): array
    {
        return [
            new GetProductTool($this->pdo),
            new UpdateInventoryTool($this->pdo),
            new SendEmailTool($this->apiKey),
        ];
    }
}

// Individual tools
class GetProductTool extends Tool
{
    public function __construct(private \PDO $pdo)
    {
        parent::__construct(
            name: 'get_product',
            description: 'Get product information by ID',
            properties: [
                new ToolProperty(
                    name: 'product_id',
                    type: ToolPropertyType::Number,
                    description: 'The product ID',
                    required: true,
                ),
            ],
        );
    }

    public function execute(array $arguments): mixed
    {
        $stmt = $this->pdo->prepare(
            'SELECT * FROM products WHERE id = :id'
        );
        $stmt->execute(['id' => $arguments['product_id']]);
        return $stmt->fetch(\PDO::FETCH_ASSOC);
    }
}

Using Static Constructor

use NeuronAI\StaticConstructor;

class EcommerceToolkit extends Toolkit
{
    use StaticConstructor;

    public static function make(\PDO $pdo, string $apiKey): self
    {
        return new self($pdo, $apiKey);
    }
}

// Usage
protected function tools(): array
{
    return [
        EcommerceToolkit::make(\DB::connection()->getPdo(), $_ENV['API_KEY']),
    ];
}

MCP Connector

Instead of implementing tools manually, you can connect to MCP servers that expose tools.

Basic MCP Connection

use NeuronAI\MCP\McpConnector;

protected function tools(): array
{
    return [
        ...McpConnector::make([
            'command' => 'npx',
            'args' => ['-y', '@modelcontextprotocol/server-everything'],
        ])->tools(),
    ];
}

Local MCP Server

protected function tools(): array
{
    return [
        ...McpConnector::make([
            'command' => 'node',
            'args' => ['/path/to/local-mcp-server/index.js'],
        ])->tools(),
    ];
}

Multiple MCP Servers

protected function tools(): array
{
    $server1 = McpConnector::make([
        'command' => 'npx',
        'args' => ['-y', '@modelcontextprotocol/server-filesystem'],
        'env' => ['ALLOWED_DIRECTORIES' => './docs'],
    ]);

    $server2 = McpConnector::make([
        'command' => 'npx',
        'args' => ['-y', '@modelcontextprotocol/server-postgres'],
    ]);

    return [
        ...$server1->tools(),
        ...$server2->tools(),
    ];
}

Common Tool Patterns

API Wrapper Tool

class APICallTool extends Tool
{
    public function __construct(
        private string $baseUrl,
        private string $apiKey
    ) {
        parent::__construct(
            name: 'api_call',
            description: 'Make an API call to external service',
            properties: [
                new ToolProperty(
                    name: 'endpoint',
                    type: ToolPropertyType::String,
                    description: 'The API endpoint',
                    required: true,
                ),
                new ToolProperty(
                    name: 'method',
                    type: ToolPropertyType::String,
                    description: 'HTTP method (GET, POST, PUT, DELETE)',
                    required: false,
                    default: 'GET',
                    enum: ['GET', 'POST', 'PUT', 'DELETE'],
                ),
                new ToolProperty(
                    name: 'data',
                    type: ToolPropertyType::Object,
                    description: 'Request body for POST/PUT',
                    required: false,
                ),
            ],
        );
    }

    public function execute(array $arguments): mixed
    {
        $client = new \GuzzleHttp\Client();
        $response = $client->request(
            $arguments['method'],
            $this->baseUrl . $arguments['endpoint'],
            [
                'headers' => ['Authorization' => "Bearer {$this->apiKey}"],
                'json' => $arguments['data'] ?? [],
            ]
        );

        return json_decode($response->getBody()->getContents(), true);
    }
}

Database Query Tool

class DatabaseQueryTool extends Tool
{
    public function __construct(private \PDO $pdo)
    {
        parent::__construct(
            name: 'execute_sql',
            description: 'Execute a SQL SELECT query on the database',
            properties: [
                new ToolProperty(
                    name: 'query',
                    type: ToolPropertyType::String,
                    description: 'The SQL SELECT query to execute',
                    required: true,
                ),
                new ToolProperty(
                    name: 'params',
                    type: ToolPropertyType::Object,
                    description: 'Query parameters for prepared statement',
                    required: false,
                ),
            ],
        );
    }

    public function execute(array $arguments): mixed
    {
        // Security: Only allow SELECT queries
        $query = trim($arguments['query']);
        if (!preg_match('/^SELECT\s/i', $query)) {
            throw new \RuntimeException('Only SELECT queries are allowed');
        }

        $stmt = $this->pdo->prepare($query);
        $params = $arguments['params'] ?? [];
        $stmt->execute($params);

        return [