throwMcpError (tools/errors.ts)

Provides structured MCP error helpers.

// Source: https://github.com/pascalorg/editor | License: MIT | Copyright 2026 Pascal Group Inc
// Provided via justclaw.it.com; keep this notice with the code.
import { ErrorCode, McpError } from '@modelcontextprotocol/sdk/types.js'
import { isAgentRefusal } from '@pascal-app/core/agent-tools'

/**
 * Throw a structured MCP error. The SDK translates `McpError` into a
 * JSON-RPC error response automatically.
 */
export function throwMcpError(code: ErrorCode, message: string, data?: unknown): never {
  throw new McpError(code, message, data)
}

/**
 * Return a non-throwing tool error payload — used for structured failures that
 * we want the client to see inline in `content` rather than as a protocol
 * error. Sets `isError: true` so SDK clients treat it as a failure.
 */
export function t

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