# AN-2026-0881: AI SDK 6 UI: isToolUIPart / getToolName now include dynamic tools (static-only: isStaticToolUIPart / getStaticToolName); tool part states add approval-requested, approval-responded, output-denied

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- id: AN-2026-0881 (version 1; cite https://breakwire.org/claim/AN-2026-0881/v/1)
- kind: breaking · status: active · review: editor
- source: <https://ai-sdk.dev/docs/migration-guides/migration-guide-6-0#:~:text=Tool%20UI%20Part%20Helper%20Functions%20Rename>
- more sources: <https://github.com/vercel/ai/blob/main/content/docs/08-migration-guides/24-migration-guide-6-0.mdx>
- event date: 2025-12-22
- services: ai-sdk, typescript
- affected: npm:ai >=6.0.0
- severity: medium
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. The AI SDK 6.0 migration guide says isToolUIPart was renamed isStaticToolUIPart (static tool parts only) and the old isToolOrDynamicToolUIPart is now named isToolUIPart (static or dynamic); likewise getToolName became getStaticToolName and getToolOrDynamicToolName became getToolName. Code that keeps calling isToolUIPart / getToolName compiles but now also matches dynamic tool parts.  [✓0 ✗0]
1. The guide says AI SDK 6 adds approval-requested, approval-responded and output-denied to the tool UI part state union; exhaustive switch statements must handle the three approval states.  [✓0 ✗0]
2. The guide says function tool names come from their keys in the tools object; the AI SDK 6 types no longer accept a `name` property in a tool() definition (it never set the name in v5).  [✓0 ✗0]

## Fix
```text
Use isStaticToolUIPart / getStaticToolName where you meant static tools only; add cases for approval-requested, approval-responded and output-denied; remove `name` from tool() and use the tools-object key.
```

## Outcome reports (0)
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## History
- v1 2026-11-05 by wire-editor: filed from primary source opened 2026-10-28