There are a couple of issues with Bounty Hunter's spell tooltips, mainly the lack of important information.

1. Shuriken Toss' stun durations are not shown anywhere (default and aghs durations)
2. Shuriken Toss' Scepter text does not say that it increases the stun duration
3. The +75 Shuriken damage talent bonus is not added to the tooltip value
4. Jinada is missing its spell immunity information at the header of the tooltip box
5. Track doesn't say that it grants vision over the target (only says true sight)


Other minor stuff:
1. Add cast range to Shuriken Toss (Track already has this)
2. Shuriken Toss has an unnecessary ALT note saying it interrupts channeling spells. Since it applies a regular stun, this is obvious and doesnt need a note.
3. New Shuriken Toss ALT note: Primary target doesn't need to be tracked for it to bounce
4. New Jinada ALT note: Illusions cannot use Jinada.
5. Shadow Walk first ALT note says it doesn't interrupt "most" channeling spells. There are no exceptions, so it should be more general
6. Shadow Walk second ALT note only mentions Jinada and could be made to include crits in general, and lifesteal and cleave
7. New Shadow Walk ALT note: Actions during the fade time dont cancel the invis
8. Track's debuff does not tell what it does. Currently, there is only text for how much gold you are carrying.
9. Rework the ALT notes regarding how the gold is granted, split up into 3 notes: 1. Gondar always gains gold, regardless of distance, 2. allies have to be within 900 range, 3. and it doesnt matter how the target dies

Image comparing the changes to the current tooltips
Spoiler: 


Here are the modified sections of dota_english.txt and npc_abilities.txt required for these changes and additions. Changed values are marked red and new values are marked blue.

Code:
		//BOUNTY HUNTER
		"DOTA_Tooltip_ability_bounty_hunter_shuriken_toss"								"Shuriken Toss"
		"DOTA_Tooltip_ability_bounty_hunter_shuriken_toss_Description"					"Hurls a deadly shuriken at an enemy unit, dealing damage and mini-stunning it. The shuriken bounces between nearby tracked enemy heroes.\n\nUpgradable by Aghanim's Scepter."
		"DOTA_Tooltip_ability_bounty_hunter_shuriken_toss_aghanim_description"			"Increases stun duration and allows Shuriken Toss to bounce twice on each hero."
		"DOTA_Tooltip_ability_bounty_hunter_shuriken_toss_Lore"							"While the shuriken may be small, Gondar's precise aim can cause critical damage."
		"DOTA_Tooltip_ability_bounty_hunter_shuriken_toss_Note0"						"The initial target does not need to be tracked for the Shuriken to bounce."
		"DOTA_Tooltip_ability_bounty_hunter_shuriken_toss_bonus_damage"					"DAMAGE:"
		"DOTA_Tooltip_ability_bounty_hunter_shuriken_toss_bounce_aoe"					"TRACK BOUNCE RANGE:"
		"DOTA_Tooltip_ability_bounty_hunter_shuriken_toss_ministun"						"STUN DURATION:"
		"DOTA_Tooltip_ability_bounty_hunter_shuriken_toss_scepter_ministun"				"SCEPTER STUN DURATION:"
		"DOTA_Tooltip_ability_bounty_hunter_shuriken_toss_cast_range_tooltip"			"CAST RANGE:"
		"DOTA_Tooltip_ability_bounty_hunter_jinada"										"Jinada"
		"DOTA_Tooltip_ability_bounty_hunter_jinada_Description"							"Bounty Hunter plans his next hit, critically striking and maiming an enemy with his next attack."
		"DOTA_Tooltip_ability_bounty_hunter_jinada_Lore"								"Whispering an enchantment he learned from Soruq to his faithful blades, Gondar targets vital tendons and joints to disable his opponents."
		"DOTA_Tooltip_ability_bounty_hunter_jinada_Note0"								"Illusions cannot use Jinada."
		"DOTA_Tooltip_ability_bounty_hunter_jinada_crit_multiplier"						"%CRITICAL DAMAGE:"
		"DOTA_Tooltip_ability_bounty_hunter_jinada_bonus_movespeed"						"%MOVE SLOW:"
		"DOTA_Tooltip_ability_bounty_hunter_jinada_bonus_attackspeed"					"ATTACK SLOW:"
		"DOTA_Tooltip_ability_bounty_hunter_jinada_duration"							"DURATION:"
		"DOTA_Tooltip_ability_bounty_hunter_wind_walk"									"Shadow Walk"
		"DOTA_Tooltip_ability_bounty_hunter_wind_walk_Description"						"Bounty Hunter becomes invisible and gains the ability to move through other units until he attacks or uses an ability. If he breaks the invisibility with an attack, that attack will deal bonus damage."
		"DOTA_Tooltip_ability_bounty_hunter_wind_walk_Lore"								"The court jesters present during King Goff's assassination can recount no other image than a dancing shadow."
		"DOTA_Tooltip_ability_bounty_hunter_wind_walk_Note0"							"Does not interrupted channeling spells on cast."
		"DOTA_Tooltip_ability_bounty_hunter_wind_walk_Note1"							"Deals its damage in a separate instance, so it is not included in Jinada's or any other critical strike, lifesteal or cleave."
		"DOTA_Tooltip_ability_bounty_hunter_wind_walk_Note2"							"Actions performed during the fade time do not break the invisibility."
		"DOTA_Tooltip_ability_bounty_hunter_wind_walk_duration"							"DURATION:"
		"DOTA_Tooltip_ability_bounty_hunter_wind_walk_fade_time"						"FADE TIME:"
		"DOTA_Tooltip_ability_bounty_hunter_wind_walk_bonus_damage"						"BONUS DAMAGE:"
		"DOTA_Tooltip_ability_bounty_hunter_track"										"Track"
		"DOTA_Tooltip_ability_bounty_hunter_track_Description"							"Tracks an enemy hero, granting vision and True Sight of the target, and information on how much gold it is carrying. Allies near the hunted are granted bonus movement speed. If the target dies, Bounty Hunter and nearby heroes collect a bonus bounty of gold."
		"DOTA_Tooltip_ability_bounty_hunter_track_Lore"									"Using his elevated senses of sight and smell, Gondar's hits have quite a good chance of success."
		"DOTA_Tooltip_ability_bounty_hunter_track_Note0"								"Bounty Hunter always gets the bonus gold, regardless of distance to the target."
		"DOTA_Tooltip_ability_bounty_hunter_track_Note1"								"Allies receive the gold only when within 900 range of the target."
		"DOTA_Tooltip_ability_bounty_hunter_track_Note2"								"It doesn't matter how the target dies, the gold is always granted."
		"DOTA_Tooltip_ability_bounty_hunter_track_Note3"								"Track's particle effects are only visible to allies."
		"DOTA_Tooltip_ability_bounty_hunter_track_Note4"								"Bonus gold is reliable gold."
		"DOTA_Tooltip_ability_bounty_hunter_track_aura_radius"							"SPEED RADIUS:"
		"DOTA_Tooltip_ability_bounty_hunter_track_bonus_move_speed_pct"					"%BONUS SPEED:"
		"DOTA_Tooltip_ability_bounty_hunter_track_bonus_gold"							"BONUS GOLD FOR ALLIES:"
		"DOTA_Tooltip_ability_bounty_hunter_track_bonus_gold_self"						"BONUS GOLD FOR SELF:"
		"DOTA_Tooltip_ability_bounty_hunter_track_duration"								"DURATION:"
		"DOTA_Tooltip_ability_bounty_hunter_track_cast_range_tooltip"					"CAST RANGE:"
		"npc_dota_hero_bounty_hunter_bio"												"When the hunted tell tales of Gondar the Bounty Hunter, none are sure of which are true. In whispered tones they say he was abandoned as a kit, learning his skill in tracking as a matter of simple survival. Others hear he was an orphan of war, taken in by the great Soruq the Hunter to learn the master's skill with a blade as they plumbed the dark forests for big game. Still others believe he was a lowly street urchin raised among a guild of cutpurses and thieves, trained in the arts of stealth and misdirection. Around campfires in the wild countryside his quarry speaks the rumors of Gondar's work, growing ever more fearful: they say it was he who tracked down the tyrant King Goff years after the mad regent went into hiding, delivering his head and scepter as proof. That it was he who infiltrated the rebel camps at Highseat, finally bringing the legendary thief White Cape to be judged for his crimes. And that it was he who ended the career of Soruq the Hunter, condemned as a criminal for killing the Prince's prized hellkite. The tales of Gondar's incredible skill stretch on, with each daring feat more unbelievable than the last, each target more elusive. For the right price, the hunted know, anyone can be found. For the right price, even the mightiest may find fear in the shadows."

		"DOTA_Tooltip_modifier_bounty_hunter_jinada_slow"				"Jinada"
		"DOTA_Tooltip_modifier_bounty_hunter_jinada_slow_Description"	"Movement speed reduced by %dMODIFIER_PROPERTY_MOVESPEED_BONUS_PERCENTAGE%%%, attack speed reduced by %dMODIFIER_PROPERTY_ATTACKSPEED_BONUS_CONSTANT%."
		"DOTA_Tooltip_modifier_bounty_hunter_wind_walk"					"Shadow Walk"
		"DOTA_Tooltip_modifier_bounty_hunter_wind_walk_Description"		"Moves through the shadows. The next attack will deal bonus damage."
		"DOTA_Tooltip_modifier_bounty_hunter_track"						"Track"
		"DOTA_Tooltip_modifier_bounty_hunter_track_Description"			"Visible to the enemy. Carrying %dMODIFIER_PROPERTY_TOOLTIP% Gold."
		"DOTA_Tooltip_modifier_bounty_hunter_track_effect"				"Track"
		"DOTA_Tooltip_modifier_bounty_hunter_track_effect_Description"	"Movement speed increased by %dMODIFIER_PROPERTY_MOVESPEED_BONUS_PERCENTAGE%%%."
Code:
	//=================================================================================================================
	// Bounty Hunter: Shuriken Toss
	//=================================================================================================================
	"bounty_hunter_shuriken_toss"
	{
		// General
		//-------------------------------------------------------------------------------------------------------------
		"ID"							"5285"														// unique ID number for this ability.  Do not change this once established or it will invalidate collected stats.
		"AbilityBehavior"				"DOTA_ABILITY_BEHAVIOR_UNIT_TARGET"
		"FightRecapLevel"				"1"
		"AbilitySound"					"Hero_BountyHunter.Shuriken"

		// Unit Targeting
		//-------------------------------------------------------------------------------------------------------------
		"AbilityUnitTargetTeam"			"DOTA_UNIT_TARGET_TEAM_ENEMY"
		"AbilityUnitTargetType"			"DOTA_UNIT_TARGET_HERO | DOTA_UNIT_TARGET_BASIC"
		"AbilityUnitDamageType"			"DAMAGE_TYPE_MAGICAL"
		"SpellImmunityType"				"SPELL_IMMUNITY_ENEMIES_NO"
		
		// Stats
		//-------------------------------------------------------------------------------------------------------------
		"AbilityCastRange"				"400"
		"AbilityCastPoint"				"0.3 0.3 0.3 0.3"
		"AbilityCooldown"				"10"
		"AbilityManaCost"				"120 130 140 150"

		// Stats
		//-------------------------------------------------------------------------------------------------------------
		"AbilityModifierSupportValue"	"0.1"	// just a mini stun

		"HasScepterUpgrade"				"1"
			
		// Special
		//-------------------------------------------------------------------------------------------------------------
		"AbilitySpecial"
		{
			"01"
			{
				"var_type"				"FIELD_INTEGER"
				"bonus_damage"			"150 225 300 375"
				"LinkedSpecialBonus"	"special_bonus_unique_bounty_hunter_2"
			}
			"02"
			{
				"var_type"				"FIELD_INTEGER"
				"speed"					"1000 1000 1000 1000"
			}
			"03"
			{
				"var_type"				"FIELD_INTEGER"
				"bounce_aoe"			"1200"
			}
			"04"
			{
				"var_type"				"FIELD_FLOAT"
				"ministun"			"0.1"
			}
			"05"
			{
				"var_type"				"FIELD_FLOAT"
				"scepter_ministun"			"0.75"
			}
			"06"
			{
				"var_type"				"FIELD_INTEGER"
				"cast_range_tooltip"			"400"
			}
		}
	}

	//=================================================================================================================
	// Bounty Hunter: Jinada
	//=================================================================================================================
	"bounty_hunter_jinada"
	{
		// General
		//-------------------------------------------------------------------------------------------------------------
		"ID"							"5286"														// unique ID number for this ability.  Do not change this once established or it will invalidate collected stats.
		"AbilityBehavior"				"DOTA_ABILITY_BEHAVIOR_PASSIVE"
		"SpellDispellableType"			"SPELL_DISPELLABLE_YES"
		"AbilitySound"					"Hero_BountyHunter.Jinada"
		"SpellImmunityType"				"SPELL_IMMUNITY_ENEMIES_YES"

		// Stats
		//-------------------------------------------------------------------------------------------------------------
		"AbilityCooldown"				"12.0 10.0 8.0 6.0"
			
		// Special
		//-------------------------------------------------------------------------------------------------------------
		"AbilitySpecial"
		{
			"01"
			{
				"var_type"				"FIELD_INTEGER"
				"crit_multiplier"		"150 175 200 225"
			}
			"02"
			{
				"var_type"				"FIELD_INTEGER"
				"bonus_movespeed"		"-15 -20 -25 -30"
			}
			"03"
			{
				"var_type"				"FIELD_INTEGER"
				"bonus_attackspeed"		"-15 -20 -25 -30"
			}
			"04"
			{
				"var_type"				"FIELD_FLOAT"
				"duration"				"3.0 3.0 3.0 3.0"
			}
		}
	}