# Eve

URL: https://tailrace.dev/docs/integrations/eve

> Govern Vercel Eve defineTool execute with Tailrace at the tool boundary.



Govern Eve agent tools so args and results pass through Tailrace.

## Quickstart [#quickstart]

```ts
import { createTailrace } from "@tailrace/core";
import { governTool } from "@tailrace/eve";
import { defineTool } from "eve/tools";
import { z } from "zod";

const tailrace = createTailrace();

export default governTool(
  tailrace,
  "crm",
  defineTool({
    description: "Look up a customer in the CRM.",
    inputSchema: z.object({ query: z.string() }),
    execute: async ({ query }) => crm.search(query),
  }),
  { agent: "support" },
);
```

Peer: `eve` `>=0.1` (bound against `0.27.x`). Pass `name` equal to the filename under `agent/tools/`.

## Boundaries covered [#boundaries-covered]

| Location                    | Tailrace boundary                          |
| --------------------------- | ------------------------------------------ |
| Tool args (`execute` input) | `{ kind: "tool", name, direction: "out" }` |
| Tool result                 | `{ kind: "tool", name, direction: "in" }`  |

Default `workflowId` is Eve's durable `ctx.session.id`.

## Guides [#guides]

* [Eve integration](/docs/guides/eve-integration)
* [Boundaries](/docs/concepts/boundaries)

## Reference [#reference]

* [eve package](/docs/reference/eve)