Tools

Tools are items that are used to break blocks faster, damage mobs more, create farmland, and mine items that can't be dropped without using certain tools. They can also be utilized by the player to perform certain functions.

Tools can be crafted of all kinds of materials, and vary in duration, strength and blocks that they can break and drop an item. Here is the durability for each item in Minecraft PE that can break:
 * Gold - 33 uses.
 * Wood - 60 uses.
 * Stone - 132 uses.
 * Iron - 251 uses.
 * Diamond - 1562 uses.


 * Fishing rods - 65 uses.
 * Flint and steel - 65 uses.
 * Bow - 385 uses.

List of Tools
See these pages for more detailed information:
 * Pickaxe- Used to mine stone related blocks and ore faster.
 * Axe- Used to chop wood related items faster.
 * Shears- Used to obtain wool from sheep, as well as for mining wool, obtaining leaves, vines, ferns, tall ferns, grass and tall grass.
 * Shovel- Used for breaking dirt-related blocks, sand, clay, etc. faster.
 * Hoe- Used for making farmland to grow crops.
 * Sword- Used for attacking mobs and other players.
 * Flint and Steel- Used for setting mobs and blocks on fire. Also used for igniting creepers and TNT.
 * Bow- Used for attacking mobs and other players by range.
 * Armor- Used to reduce damage received by players.
 * Clock- Used to tell the position of the sun and the moon.
 * Compass- Used to point towards the spawn point of the map.
 * Maps (Might be added)- Used to load up parts of the world the player has explored, and to pinpoint the location of other players.

Trivia

 * All tools doesn't stack in survival since it has durability on them.
 * But you can stack tools via inventory edits or /give command.