Home > @google/generative-ai > FunctionDeclaration
Structured representation of a function declaration as defined by the [OpenAPI 3.0 specification](https://spec.openapis.org/oas/v3.0.3). Included in this declaration are the function name and parameters. This FunctionDeclaration is a representation of a block of code that can be used as a Tool by the model and executed by the client.
Signature:
export declare interface FunctionDeclaration | Property | Modifiers | Type | Description |
|---|---|---|---|
| description? | string | (Optional) Optional. Description and purpose of the function. Model uses it to decide how and whether to call the function. | |
| name | string | The name of the function to call. Must start with a letter or an underscore. Must be a-z, A-Z, 0-9, or contain underscores and dashes, with a max length of 64. | |
| parameters? | FunctionDeclarationSchema | (Optional) Optional. Describes the parameters to this function in JSON Schema Object format. Reflects the Open API 3.03 Parameter Object. string Key: the name of the parameter. Parameter names are case sensitive. Schema Value: the Schema defining the type used for the parameter. For function with no parameters, this can be left unset. |