Review CMS content with the PHP Agent SDK

<?php
use Phaseo\AgentSdk\AgentSdk;
use Phaseo\AgentSdk\Tool;

$loadDraft = AgentSdk::defineTool(new Tool(
    id: "load-draft",
    description: "Load one CMS draft by slug.",
    parameters: [
        "type" => "object",
        "properties" => [
            "slug" => ["type" => "string"],
        ],
        "required" => ["slug"],
    ],
    execute: static fn (mixed $input, $context) => [
        "slug" => $input["slug"] ?? "homepage",
        "headline" => "Phaseo makes gateway routing visible.",
    ]
));

<?php
use Phaseo\AgentSdk\AgentDefinition;

$agent = AgentSdk::createAgent(new AgentDefinition(
    id: "content-review-agent",
    model: "openai/gpt-5.4-nano",
    instructions: "Use tools when helpful and return concise editorial feedback.",
    tools: [$loadDraft]
));

$result = $agent->run(
    input: "Review the homepage draft and suggest one headline improvement.",
    client: AgentSdk::createGatewayAgentClient()
);

echo $result->output . PHP_EOL;