You do not inherently have any senses, unless specified from other sources. However, you read the mind of others to sense through them.
You can telepathically perceive through every sentient creature within 30 ft. this includes both friend and foe, and does not require consent.
Every time you do an ability check or save using senses (perception, investigation, insight) you make somebody else roll for you using their stats.

Simply meaning everything everyone around you can sense, you can see too.

Whoever you choose to do the check/ability, can choose to automatically fail any check done using their senses.

You have the ability to shred your opponent using yourself.

Gratings Traveler. you attempt to shred somebody using your body.
this attack counts as both a light melee weapon attack, and an unarmored strike.
this attack is finesse and light. 

If your target is wielding you, you have advantage against that target with this attack.

due to your small stature, you have an advantage when hiding (even in plain sight) creatures can pick you up without thinking you are what is stalking them.

your metal make up grants you higher constitution

YOU TOOL! YOU ABSOLUTE TOOL!

Tool. Yes, you. You are a tool. You are made to be practical, so you can be used to grate effect as a weapon.
Other creatures (both friend and foe) can interact with you, the same way they would with any other object.

That being said, you still counts as a creature, so just stop the mere thought of rules-lawyering about how "you are an object, not 'technically' a creature, so you cannot be targeted by attacks." You are both.

Pick me up. Any willing creature (both foe and friend) within reach has the ability to pick you up, equip you, and use you as a simple weapon.
When wielding you, they count you as a dagger.

Escaping a wielder. You can use your action to make a Strength (Athletics) or Dexterity (Acrobatics) check against your wielder’s Strength (Athletics) check, ending the condition on itself on a success. The condition also ends if your wielder has the Incapacitated condition or if the distance between you and the wielder exceeds the wielder’s melee range.

Grater strike. Your wielder can spend their action to use your "Gratings Traveler" (the weapon attack one that is also an unarmed strike) ability as if it was their ability.
When they do, it doesn't count as an unarmed strike for them... since you are their, weapon...

I Cast Cheese Grater! When your wielder use you to do a weapon attack you can expend your reaction to make a helping action for your wielder,
or make the weapon attack automatically miss. If you are thrown, you are moved to where you were thrown. If your wielder miss, you land within 5ft. (in a direction of your choice,) from intended target.

You do not require air, food, drink, or sleep. Instead, you enter a restful state, remaining semiconscious, for 4 hours a day. While resting, you can dream after a fashion; such dreams are
reflexive mental exercises inherent to your consciousness. After resting in this way, you gain the same benefit that a human does from 8 hours of sleep.

Well... how do I say this.... uhm... I don't grant you hands, nor do I grant you a mouth to talk.

That being said, you are telepathic.
You can make a willing creature of your choice within 30 feet perform the Verbal and/or Somatic components for you. This does not cost them any actions.
If you do, any spell you cast that doesn't have the range of "self" (or something saying that it can only be cast on yourself), will originate from the one who performed your somatic and/or verbal component. If the creature you choose is unwilling, then you don't get no Verbal nor Somatic spell component. too bad.

Telepathetic Utterance. You cannot speak, but you can "speak" telepathically to any creature you can see within 60 feet of yourself. Your telepathic utterances are in a language you know, and the creature understands you only if it knows that language. Your communication doesn’t give the creature the ability to respond to you telepathically.

Your character knows at least two languages: Common plus one language you roll or choose from any language your DM allows you to know. Knowledge of a language means your character can communicate in it, read it, and write it. Your class and other features might also give you language.