Tool

Kotlin |Java

@Target(allowedTargets = [AnnotationTarget.FUNCTION])
@Retention(value = AnnotationRetention.RUNTIME)
public annotation Tool

Annotates a function to register it as a Tool that can be called by the generative model.

Summary

Public constructors
`Tool(@NonNull String name, @NonNull String description)`

Public methods
`final @NonNull String`	`getDescription()` A detailed description of what the tool does, used by the model to determine when to call it.
`final @NonNull String`	`getName()` The name of the tool.

public Tool(@NonNull String name, @NonNull String description)

public final @NonNull String getDescription()

A detailed description of what the tool does, used by the model to determine when to call it.

public final @NonNull String getName()

The name of the tool. If not specified, the function name will be used.

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Last updated 2026-07-15 UTC.