Toads irl are little amphibians that are cousins of frogs, comfortable both in the water and out of it. They have powerful back legs for jumping and have a pouch like mouth which they use to croak, they also have an elastic tongue which they launch out of their mouth to catch small insects. Some toads have even evolved to possess poisonous glands in their skin to discourage predators from eating them.
Toads in the narutoverse can come in many sizes, similar to irl toads or huge bigger than houses. However they are much more dexterous with their arms and fingers, able to wield weapons equivalent to their size while still retaining the enormous jumping power of their back legs. They are often weapons masters and utilize their unique characteristics for techniques. Such as their mouths, tongues or natural croaking noises. In addition they are the first species shown to possess and be able to pass on a sage mode to chosen students.
Toads are the greatest of all time... remember that... a toad even taught the sage of the six paths... just saiyan U_U
Contracted Animals: Toads
Canon Bio Signers: Jiraiya, Minato Namikaze, Naruto Uzumaki, and Konohamaru Sarutobi
Description and Background: They vary greatly in size; ranging from giant summons such as Gamabunta, Gamaken and Gamahiro that tower over trees and can dwarf large rock formations, while others such as Gamakichi and Gamatatsu, were small enough in Part I to ride on a man's head. They reside on Mount Myōboku.
Mount Myōboku's population includes unique species of toads and other toad-like amphibians. Some are have unique body structures, as in the Scroll Toads which can have secrets written on their scroll-abdomens. Others merely have unique skills or qualifications, as in the "Tracker Toad" which can be used to locate individuals.
Toads possess a wide range of abilities, being able to spit water or oil from their mouths as well as utilizing things ranging from their own tongues and weapons in battle. Toads are also familiar with senjutsu, making them (along with their contractor) very powerful when invoked on the battlefield.
Consider this signed.
Right lets go through the summons:
(Kuchiyose no Jutsu: Gamariki) Summoning Technique: Gamariki
Type: Supplementary
Rank: B
Range: Short
Chakra: 20
Damage: N/A
Description: Gamariki is one of the most unique toad summons from mount Myobokuzan. Although with a very feminine appearance and behavior, he's actually a male (this contrast has lead to many comedic scenes between him and naruto). Slightly bigger than a human, he is a capable toad warrior, with the ability to use Water techniques up to A-Rank, Genjutsu up to B-Rank as well as like most toads, he can use Oil techniques.
Note: can only be summoned once
(Kuchiyose no Jutsu: Gamatatsu) Summoning Technique: Gamatatsu
Type: Supplementary
Rank: B
Range: Short
Chakra: 20
Damage: N/A
Description: Gamatatsu is the younger son of Gamabunta and Gamakichi's younger brother. Contrasting with his brother and father, he has a somewhat aloof and awkward personality, general distracted from battle and his surroundings. Despite this, along with his brother, he has been training to become a Toad Warrior. Standing more or less with the same height as his brother (similar to a human), he can fight in hand to hand combat, albeit with a lower skill than his brother, but can also use Water techniques up to A-Rank. Similar to most toads, he can use Oil techniques.
Note: requires signing of the Toad Contract.
Note: can only be summoned once
(Kuchiyose no Jutsu: Gamachu) Summoning Technique: Gamachu
Type: Supplementary
Rank: B
Range: Short
Chakra: 20
Damage: N/A
Description: Is the first toad named in the series. Gamachu is a mid-level toad that first appears when Jiraiya is introduced. Gamachu is always seen wearing samurai armor in battle. When he first appeared in the manga, Gamachu seems to strike the same type of pose as Jiraiya, as he would also seem to have become the personal summon of Jiraiya. This toad seems to be the keeper of the Toad Summoning contract scroll and unlike every other toad ever seen, Gamachu has not yet been seen talking, only quaking once or twice and mainly in the anime. In terms of appearance, the kanji on the necklace around his neck means "friendship," perhaps alluding to the fact that Jiraiya summons him in more relaxed situations. Only slightly smaller than a human, Gamachu is a very capable warrior specializing in Kenjutsu techniques. He can use both skills up to S-Rank as well as Strong Fist taijutsu (non EIG). Like most toads, he can use Oil techniques.
Note: can only be summoned once