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name: built-in-tools description: "Routes OpenHands built-in tool names, default presets, tool registration, browser availability, workflow scripts, and sub-agent tool wiring." disable-model-invocation: true metadata: disco-role: operating license: MIT

Built-in Tools

Use this sub-skill for openhands-tools: tool names, registration, resolution, default presets, browser availability, workflow scripts, and the built-in sub-agent tool sets.

What this route owns

• register_tool, resolve_tool, list_registered_tools, list_usable_tools, and module qualnames.
• TerminalTool, FileEditorTool, TaskTrackerTool, BrowserToolSet, WorkflowToolSet, TaskToolSet, and related helper tools.
• Default presets such as get_default_tools(), get_default_agent(), and register_default_tools().
• Tool-set usability checks and the registry behavior that surfaces tool availability.
• Workflow tool validation and safe script execution constraints.

Start here

Read references/tool-catalog.md for the public tool names and their primary roles. Read references/workflow-tool.md for the dynamic workflow script model. Read references/troubleshooting.md when a tool is missing, browser support is unavailable, or a workflow script is rejected.

Run scripts/list_default_tools.py to print the default tool names and registry state.

Typical triggers

• "Which tool should I use for shell commands or file edits?"
• "Why is the browser tool missing?"
• "How do I register a custom tool?"
• "How do workflow scripts work?"
• "Why does /server_info omit a tool?"

Cross-links

• For local agent lifecycle and Conversation creation, go to ../agent-core/SKILL.md.
• For remote custom-tool imports on agent-server, go to ../remote-runtime/SKILL.md.
• For maintainer checks on tool registration, go to ../repo-development/SKILL.md.