Function validateToolReference

apps/sim/lib/workflows/sanitization/validation.ts:299–315

(
  toolId: string | undefined,
  blockType: string,
  blockName?: string
)

 * Returns null if valid, error message if invalid
 */
export function validateToolReference(
  toolId: string | undefined,
  blockType: string,
  blockName?: string
): string | null {
  if (!toolId) return null

  if (!isCustomTool(toolId) && !isMcpTool(toolId)) {
    // For built-in tools, verify they exist
    const tool = getTool(toolId)
    if (!tool) {
      return `Block ${blockName || 'unknown'} (${blockType}): references non-existent tool '${toolId}'`
    }
  }

  return null
}