15 pages for canusetool.

How the agent loop works Claude Code CLI · in the page agent-sdk/agent-loop …"default"` | Tools not covered by allow rules trigger your `canUseTool` callback; no callback means deny… Intercept and control agent behavior with hooks Claude Code CLI · in the page agent-sdk/hooks …ion) once a permission request has waited about six seconds on your [`canUseTool` callback](/docs/en/agent-sdk/user-input). Requires TypeScript Agent SDK v0.3.233 or later, or Python Agent SDK v0.2.13… Configure permissions Claude Code CLI · in the page agent-sdk/permissions …ion modes and rules to define what's allowed automatically, and the [`canUseTool` callback](/docs/en/agent-sdk/user-input) to handle everything else at runtime. ## How permissions are evaluated When… Agent SDK reference - Python Claude Code CLI · in the page agent-sdk/python …ted stderr: Callable[[str], None] | None = None can_use_tool: CanUseTool | None = None hooks: dict[HookEvent, list[HookMatcher]] | None = None user: str | None = None include_parti… Extend agents with skills Claude Code CLI · in the page agent-sdk/skills …rs. For the full permission flow, including permission modes and the `canUseTool` callback, see [Permissions](/docs/en/agent-sdk/permissions). ## Troubleshooting ### Skills not found **Check settin… Subagents in the SDK Claude Code CLI · in the page agent-sdk/subagents …e subagent calls. Without it, Agent invocations fall through to your `canUseTool` callback or, in `dontAsk` mode, are denied * **Use explicit prompting**: mention the subagent by name in your prompt,… Agent SDK reference - TypeScript Claude Code CLI · in the page agent-sdk/typescript …ession in. Other unlisted tools fall through to `permissionMode` and `canUseTool`. Use `disallowedTools` to block tools. See [Permissions](/docs/en/agent-sdk/permissions#allow-and-deny-rules)… Handle approvals and user input Claude Code CLI · in the page agent-sdk/user-input …ying questions** (via the `AskUserQuestion` tool). Both trigger your `canUseTool` callback, which pauses execution until you return a response. This is different from normal conversation turns where C… Claude Code changelog Claude Code CLI · in the page changelog …ash commands (e.g. `touch`, `rm`) without a permission prompt or SDK `canUseTool` callback * Fixed worktree creation following a repository-committed symlink at `.claude/worktrees`, which could crea… Environment variables Claude Code CLI · in the page env-vars …ication) in sessions where Claude Code sends them to the Agent SDK's `canUseTool` callback, which is how Claude Desktop and the VS Code extension host Claude Code. Has no effect in terminal sessions.… Hooks reference Claude Code CLI · in the page hooks …y in sessions where it sends permission requests to the Agent SDK's [`canUseTool` callback](/docs/en/agent-sdk/user-input), which is how Claude Desktop and the VS Code extension host Claude Code: * E… Automate actions with hooks Claude Code CLI · in the page hooks-guide …s) with the `-p` flag, that prompt only exists when the Agent SDK's [`canUseTool` callback](/docs/en/agent-sdk/permissions) supplies it. In plain `-p` runs or with `--permission-prompt-tool`, use `Pre… Connect Claude Code to tools via MCP Claude Code CLI · in the page mcp …ction; not supported via --permission-prompt-tool`. The Agent SDK's [`canUseTool` callback](/docs/en/agent-sdk/permissions) does receive these calls and can approve them, because your SDK application… Monitoring Claude Code CLI · in the page monitoring-usage …ssion prompt request itself fails, for example when the Agent SDK's [`canUseTool`](/docs/en/agent-sdk/typescript#canusetool) callback or the [`--permission-prompt-tool`](/docs/en/cli-reference#cli-fla… Orchestrate subagents at scale with dynamic workflows Claude Code CLI · in the page workflows …/en/cli-reference#cli-flags) approves it, or, with the Agent SDK, a [`canUseTool`](/docs/en/agent-sdk/permissions) callback or a [`PermissionRequest` hook](/docs/en/hooks#permissionrequest) approves i…