This is a list of what game data and content the Eos Toolset currently edits (as of 0.74) and what is missing that you'll need to hand edit still.

Note that arbitrary TLK string editing isn't included, but you can add custom tables to have some TLK strings added.

Game Data TypeEditable?Notes
Race DataYesRaces and race feats can be added
Class DataYesClasses, Class Feat lists, Bonus Feat lists, Skill lists, BAB, Saving Throw tables, Prerequisites, Stat Changes, Spell Slots and Known Spells can all be edited.
Package DataYesPackages, Equipment, Spell/Feat/Skill preferences.
DomainsYesNote: you cannot have level 0 domain spells due to engine limitations (not that D&D does)
SpellsYesAll usual spell data
FeatsYes

All usual feat data plus master feats, note they can be categorised as the toolset.

SkillsYesAll usual skill data
Saving Throw TypesYesSAVING_THROW_TYPE_* values, including item properties
DiseasesYes
PoisonsYes
Base ItemsYesAll the properties of items
Item PropertiesYesCategories for each item type, linked to item properties consisting of their tables, cost tables and parameter tables.
Damage TypesYesIncludes damage hit visuals and new ammo types
TrapsYes
Animal CompanionsYes
FamiliarsYes
Appearance DataYesAlso includes movement sound sets.
PolymorphsYes
Area of EffectsYes
SoundsetsYes

Along with editing soundset.2da you can add new soundset files which are exported to the correct SSF format.

Note soundsettype.2da can't be edited (although not sure why you'd need more categories).

Weapon SoundsYes
Inventory SoundsYes
PortraitsYes
Visual EffectsYesIncludes Programmed Effects (progfx.2da) as well.
Not Included but useful (TLK needed)

Load Screens and Load Screen HintsNoLoad Screens don't need TLK strings but Load Screen Hints do.
Effect IconsNo
String TokensNo
BodybagNo
Phenotypes and Armor Parts and CloaksNo
Tail and Wing entriesNo
Not included but useful (No TLK)

Placeable Appearances and SoundsNo
Generic Door AppearancesNo
SkyboxesNo
WeatherNo
Ambient Music and Ambient SoundsNo
ArmorNoWhile AC isn't editable the rest are and technically new entries can be added
ActionsNoWhile hardcoded the icon references are not
EncumbranceNo
Experience TableNo

Item Value

No

Item Level Restrictions 2da

Skill vs. Item Cost

No

Used to determine if an item can be equipped by rogues with UMD.

Rest Duration

No

This can be useful to edit down the long rest times if a custom rest system is put in place.

Not included and less useful

CursorsNoOnly used for the mouseover of triggers, but still some minor point to having it
Tileset edge and Tileset DoorsNoVery tileset specific
Surface MaterialsNo
State ScriptsNo
Character Generation ClothingNo
Creature Speed and Sight RangeNoNew entries can be added (and editing the more hardcoded ones can be useful). Note creature size is basically hardcoded so no point to have that.
EnvironmentsNoenvironment.2da defines area presets for colours etc.
WaypointsNo
Not included and very specific

Repute and Reputation AdjustmentsNoDefault faction reputations in repute.2da and repadjust.2da
Excite DurationNo
Encoding 2daNoUsed for specific language changes for the game
Difficulty SettingsNo
Epic AttacksNo
Epic SavesNo
Damage LevelsNo