# strata19.start_action
URL: /documentation/reference/tools/start_action



{/* GENERATED FILE — do not edit. Sources: src/mcp/facade/tool-projection-registry.ts (availability) + describe() in src/mcp/facade/facade-tools.ts (prose). Regenerate: pnpm exec tsx scripts/docs/site/generate-tool-reference.ts */}

## What it does [#what-it-does]

Start a long-running action asynchronously and return a job handle for polling.

## When to use it [#when-to-use-it]

**Use when:** "run this in the background" · "it keeps timing out" · "start it now and check back later" — the action may exceed the host call timeout (e.g., compute\_change\_impact, verify\_implementation on large repos).

**Also use when:** you want to start work and check results later without holding the connection open.

## When not to use it [#when-not-to-use-it]

the action is fast (\<30s) — use the synchronous tool directly.

## Availability [#availability]

|           |                                       |
| --------- | ------------------------------------- |
| Tier      | Expert                                |
| Lifecycle | Live                                  |
| Taught by | *no packaged skill teaches this tool* |