Ito ang kontrata; malinaw ang kasunduan.

Ang is the common topic marker in Filipino. It marks the noun phrase that the sentence is talking about.

• Ito ang kontrata → ang kontrata is the thing being identified.
• malinaw ang kasunduan → ang kasunduan is the thing being described as clear.

So in both clauses, ang marks the main noun phrase of the statement.

In Filipino, predicate-first word order is very common, especially in simple identification sentences.

So:

• Ito ang kontrata = literally something like This [is] the contract
• Ang kontrata ay ito is also possible, but it is a different word order with ay

The version in your sentence is the more natural, everyday pattern.

Yes. That is grammatical.

There are two common patterns here:

• Predicate first: Ito ang kontrata
• Topic first with ay: Ang kontrata ay ito

Likewise:

• malinaw ang kasunduan
• Ang kasunduan ay malinaw

The meaning is basically the same, but the predicate-first version often sounds more natural and less formal in ordinary speech.

Filipino often does not need a separate verb equivalent to English is in this kind of sentence.

Both clauses are non-verbal clauses:

• Ito ang kontrata → identification
• malinaw ang kasunduan → description

English needs is, but Filipino usually does not in sentences like these.

Because these are two different structures.

• malinaw ang kasunduan = the agreement is clear
  Here malinaw is the predicate of the whole clause.

• malinaw na kasunduan = a clear agreement
  Here malinaw directly modifies kasunduan as an adjective, so the linker na is needed.

So the absence of na tells you that malinaw is not just modifying the noun inside one phrase; it is functioning as the main predicate of the clause.

They are related, but not exactly identical.

• kontrata usually means contract, often something formal or legal
• kasunduan usually means agreement, which can be formal or general

In this sentence, using both is natural because a contract contains or represents an agreement. The wording can suggest something like: this is the contract, and the agreement in it is clear.

The semicolon links two closely related independent clauses:

• Ito ang kontrata
• malinaw ang kasunduan

It works much like in English: the two statements are separate, but they are strongly connected in meaning.

A period would also work. In some contexts, a comma or a conjunction might be used instead, but the semicolon gives a neat, formal written style.

Not always. Filipino demonstratives depend on distance and sometimes discourse context.

Common forms are:

• ito = this, near the speaker
• iyan = that, near the listener
• iyon = that, farther from both

So Ito ang kontrata is appropriate if the contract is near the speaker, being pointed to, or is the immediately relevant item in the conversation.

Not explicitly. This kind of Filipino sentence does not show tense the way English does.

malinaw ang kasunduan usually reads as present or generally true, depending on context:

• The agreement is clear
• The agreement was clear
• The agreement will be clear

If you need a specific time meaning, context or extra time expressions usually make it clear.

By itself, kasunduan is normally understood as singular unless context suggests otherwise.

If you wanted to make plurality explicit, Filipino often uses markers or context rather than changing the noun form much the way English does. For example, plural marking can appear with words like mga in many noun phrases, though whether that sounds natural depends on the sentence.

Here, ang kasunduan is most naturally understood as the agreement.

It could be, but it would mean something slightly different.

• malinaw ang kontrata = the contract is clear
• malinaw ang kasunduan = the agreement is clear

The actual sentence uses two related but distinct ideas:

1. This is the contract
2. The agreement is clear

That can sound a bit more nuanced than simply repeating kontrata. It shifts attention from the physical/formal document to the actual agreement or terms involved.

It sounds fairly neutral, with a slightly formal feel because of the vocabulary and the semicolon.

• kontrata and kasunduan are standard words
• the semicolon makes it look more polished or written
• the grammar itself is normal and natural

So it would fit well in written Filipino and would also be understandable in speech, though in casual conversation people might split it into two shorter sentences.