File Core/Schema/Error/InvalidParamsError.php

1:	<?php
2:
3:	declare(strict_types=1);
4:
5:	/**
6:	* This file is part of the Nexus MCP SDK package.
7:	*
8:	* (c) 2026 John Paul E. Balandan, CPA <paulbalandan@gmail.com>
9:	*
10:	* For the full copyright and license information, please view
11:	* the LICENSE file that was distributed with this source code.
12:	*/
13:
14:	namespace Nexus\Mcp\Core\Schema\Error;
15:
16:	use Nexus\Assert\Assert;
17:	use Nexus\Mcp\Core\Schema\Enum\ProtocolErrorCode;
18:	use Nexus\Mcp\Core\Schema\Error;
19:
20:	/**
21:	* A JSON-RPC error indicating that the method parameters are invalid or malformed.
22:	*
23:	* In MCP, this error is returned in various contexts when request parameters fail validation:
24:	*
25:	* - Tools: Unknown tool name or invalid tool arguments
26:	* - Prompts: Unknown prompt name or missing required arguments
27:	* - Pagination: Invalid or expired cursor values
28:	* - Logging: Invalid log level
29:	* - Elicitation: Server requests an elicitation mode not declared in client capabilities
30:	* - Sampling: Missing tool result or tool results mixed with other content
31:	*
32:	* @extends Error<array{code: -32602, message: non-empty-string, data?: mixed}>
33:	*
34:	* @see https://modelcontextprotocol.io/specification/draft/schema#invalidparamserror
35:	*/
36:	final readonly class InvalidParamsError extends Error
37:	{
38:	public const string DEFAULT_MESSAGE = 'Invalid params';
39:
40:	public function __construct(string $message, mixed $data = null)
41:	{
42:	parent::__construct(code: ProtocolErrorCode::InvalidParams, message: $message, data: $data);
43:	}
44:
45:	#[\Override]
46:	public static function fromArray(array $data): static
47:	{
48:	$message = $data['message'] ?? self::DEFAULT_MESSAGE;
49:	Assert::that($message)->isString('error "message" must be a string, {type} given.');
50:
51:	return new self(message: $message, data: $data['data'] ?? null);
52:	}
53:
54:	#[\Override]
55:	public function toArray(): array
56:	{
57:	$result = [
58:	'code' => ProtocolErrorCode::InvalidParams->value,
59:	'message' => $this->message,
60:	];
61:
62:	$data = $this->data ?? [];
63:
64:	if ([] !== $data) {
65:	$result['data'] = $data;
66:	}
67:
68:	return $result;
69:	}
70:	}
71:

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