Tools reference changedtools-reference
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1515| Tool | Description | Permission required |
1616| :--------------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | :------------------ |
17| `Agent` | Spawns a [subagent](/docs/en/sub-agents) with its own context window to handle a task. See [Agent tool behavior](#agent-tool-behavior) | No |
17| `Agent` | Spawns a [subagent](/docs/en/sub-agents) with its own context window to handle a task. With [agent teams](/docs/en/agent-teams) enabled, a call that carries a `name` can launch a [teammate](/docs/en/agent-teams#how-claude-starts-agent-teams) instead. See [Agent tool behavior](#agent-tool-behavior) | No |
1818| `Artifact` | Publishes an HTML or Markdown file as an [artifact](/docs/en/artifacts): a private, interactive page on claude.ai. You can share it with a public link, or inside your organization on Team and Enterprise plans, where public sharing requires an Owner to [enable it](/docs/en/artifacts#control-public-sharing). Requires a Pro, Max, Team, or Enterprise plan and `/login` authentication; see [Availability](/docs/en/artifacts#availability) | Yes |
1919| `AskUserQuestion` | Asks multiple-choice questions to gather requirements or clarify ambiguity. Questions stay open until you answer them by default. See [AskUserQuestion tool behavior](#askuserquestion-tool-behavior) | No |
2020| `Bash` | Executes shell commands in your environment. See [Bash tool behavior](#bash-tool-behavior) | Yes |
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9292## Agent tool behavior
9393
94The Agent tool spawns a subagent in a separate context window. The subagent works through its task autonomously, then returns a single text result to the parent conversation. The parent doesn't see the subagent's intermediate tool calls or outputs, only that final result.
94The Agent tool spawns a subagent in a separate context window. The subagent works through its task autonomously, then returns a single text result to the parent conversation. The parent doesn't see the subagent's intermediate tool calls or outputs, only that final result. With [agent teams](/docs/en/agent-teams) enabled, a call that carries a `name` can launch a [teammate](/docs/en/agent-teams#how-claude-starts-agent-teams) instead, which reports back through team messages rather than by returning a result.
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9696To cap how many turns a subagent runs, set `maxTurns` in the [subagent definition](/docs/en/sub-agents#supported-frontmatter-fields).
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98The same Agent tool also launches [forked subagents](/docs/en/sub-agents#fork-the-current-conversation) wherever [fork mode](/docs/en/sub-agents#turn-fork-mode-on-or-off) is on. A fork inherits the full parent conversation instead of starting fresh, runs in the background apart from the [cases that stay in the foreground](/docs/en/sub-agents#run-subagents-in-foreground-or-background), and still surfaces permission prompts in your terminal. The rest of this section describes named subagents.
98The same Agent tool also launches [forked subagents](/docs/en/sub-agents#fork-the-current-conversation) wherever [fork mode](/docs/en/sub-agents#turn-fork-mode-on-or-off) is on. A fork inherits the full parent conversation instead of starting fresh, runs in the background apart from the [cases that stay in the foreground](/docs/en/sub-agents#run-subagents-in-foreground-or-background), and still surfaces permission prompts in your terminal. The rest of this section describes non-fork subagents.
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100Which tools a named subagent can use depends on the `tools` and `disallowedTools` fields in the [subagent definition](/docs/en/sub-agents):
100Which tools a non-fork subagent can use depends on the `tools` and `disallowedTools` fields in the [subagent definition](/docs/en/sub-agents):
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102102* **Neither field set**: the subagent inherits every [tool available to subagents](/docs/en/sub-agents#available-tools).
103103* **`tools` only**: the subagent gets only the listed tools.
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