---
url: >-
  https://adk.nht.io/api/@nhtio/adk/exceptions/variables/E_INVALID_INITIAL_TOOL_CALL_VALUE.md
description: >-
  Thrown when a {@link @nhtio/adk!ToolCall} is initialised with a value that
  fails schema validation.
---

# Variable: E\_INVALID\_INITIAL\_TOOL\_CALL\_VALUE

```ts
const E_INVALID_INITIAL_TOOL_CALL_VALUE: CreatedException<[]>;
```

Defined in: [lib/exceptions/runtime.ts:362](https://github.com/NHTIO/ADK/blob/v1.20260605.0/src/lib/exceptions/runtime.ts#L362)

Thrown when a [@nhtio/adk!ToolCall](../../forge/classes/ToolCall.md) is initialised with a value that fails schema validation.

## Remarks

`ToolCall` requires `id`, `tool`, `args`, `checksum`, `isComplete`, `isError`, `createdAt`,
and `updatedAt` to be present and of the correct type. Passing an incomplete or incorrectly
typed object signals a programming error in the caller, not a recoverable runtime condition.