Toolsets are named bundles of tools that control what the agent can do. They're the primary mechanism for configuring tool availability per platform, per session, or per task.
## How Toolsets Work
Every tool belongs to exactly one toolset. When you enable a toolset, all tools in that bundle become available to the agent. Toolsets come in three kinds:
- **Core** — A single logical group of related tools (e.g., `file` bundles `read_file`, `write_file`, `patch`, `search_files`)
- **Composite** — Combines multiple core toolsets for a common scenario (e.g., `debugging` bundles file, terminal, and web tools)
- **Platform** — A complete tool configuration for a specific deployment context (e.g., `hermes-cli` is the default for interactive CLI sessions)
## Configuring Toolsets
### Per-session (CLI)
```bash
hermes chat --toolsets web,file,terminal
hermes chat --toolsets debugging # composite — expands to file + terminal + web
hermes chat --toolsets all # everything
```
### Per-platform (config.yaml)
```yaml
toolsets:
- hermes-cli # default for CLI
# - hermes-telegram # override for Telegram gateway
```
### Interactive management
```bash
hermes tools # curses UI to enable/disable per platform
| `homeassistant` | `ha_call_service`, `ha_get_state`, `ha_list_entities`, `ha_list_services` | Smart home control via Home Assistant. Only available when `HASS_TOKEN` is set. |
| `image_gen` | `image_generate` | Text-to-image generation via FAL.ai. |
| `web` | `web_extract`, `web_search` | Web search and page content extraction. |
## Composite Toolsets
These expand to multiple core toolsets, providing a convenient shorthand for common scenarios:
| Toolset | Expands to | Use case |
|---------|-----------|----------|
| `debugging` | `patch`, `process`, `read_file`, `search_files`, `terminal`, `web_extract`, `web_search`, `write_file` | Debug sessions — file access, terminal, and web research without browser or delegation overhead. |
| `safe` | `image_generate`, `mixture_of_agents`, `vision_analyze`, `web_extract`, `web_search` | Read-only research and media generation. No file writes, no terminal access, no code execution. Good for untrusted or constrained environments. |
## Platform Toolsets
Platform toolsets define the complete tool configuration for a deployment target. Most messaging platforms use the same set as `hermes-cli`:
| Toolset | Differences from `hermes-cli` |
|---------|-------------------------------|
| `hermes-cli` | Full toolset — all 39 tools including `clarify`. The default for interactive CLI sessions. |
| `hermes-acp` | Drops `clarify`, `cronjob`, `image_generate`, `mixture_of_agents`, `send_message`, `text_to_speech`, homeassistant tools. Focused on coding tasks in IDE context. |
| `hermes-api-server` | Drops `clarify` and `send_message`. Adds everything else — suitable for programmatic access where user interaction isn't possible. |
| `hermes-telegram` | Same as `hermes-cli`. |
| `hermes-discord` | Same as `hermes-cli`. |
| `hermes-slack` | Same as `hermes-cli`. |
| `hermes-whatsapp` | Same as `hermes-cli`. |
| `hermes-signal` | Same as `hermes-cli`. |
| `hermes-matrix` | Same as `hermes-cli`. |
| `hermes-mattermost` | Same as `hermes-cli`. |
| `hermes-email` | Same as `hermes-cli`. |
| `hermes-sms` | Same as `hermes-cli`. |
| `hermes-dingtalk` | Same as `hermes-cli`. |
| `hermes-feishu` | Same as `hermes-cli`. |
| `hermes-wecom` | Same as `hermes-cli`. |
| `hermes-homeassistant` | Same as `hermes-cli`. |
| `hermes-webhook` | Same as `hermes-cli`. |
| `hermes-gateway` | Union of all messaging platform toolsets. Used internally when the gateway needs the broadest possible tool set. |
## Dynamic Toolsets
### MCP server toolsets
Each configured MCP server generates a `mcp-<server>` toolset at runtime. For example, if you configure a `github` MCP server, a `mcp-github` toolset is created containing all tools that server exposes.
This creates a `mcp-github` toolset you can reference in `--toolsets` or platform configs.
### Plugin toolsets
Plugins can register their own toolsets via `ctx.register_tool()` during plugin initialization. These appear alongside built-in toolsets and can be enabled/disabled the same way.
### Custom toolsets
Define custom toolsets in `config.yaml` to create project-specific bundles:
```yaml
toolsets:
- hermes-cli
custom_toolsets:
data-science:
- file
- terminal
- code_execution
- web
- vision
```
### Wildcards
-`all` or `*` — expands to every registered toolset (built-in + dynamic + plugin)
## Relationship to `hermes tools`
The `hermes tools` command provides a curses-based UI for toggling individual tools on or off per platform. This operates at the tool level (finer than toolsets) and persists to `config.yaml`. Disabled tools are filtered out even if their toolset is enabled.
See also: [Tools Reference](./tools-reference.md) for the complete list of individual tools and their parameters.