# Tool Usage Notes

Tool signatures are provided automatically via function calling.
This file documents non-obvious constraints and usage patterns.

## exec — Safety Limits

- Commands have a configurable timeout (default 60s)
- Dangerous commands are blocked (rm -rf, format, dd, shutdown, etc.)
- Output is truncated at 10,000 characters
- `restrictToWorkspace` config can limit file access to the workspace

## cron — Scheduled Reminders

- Please refer to cron skill for usage.

## Web Search Tool Priority

When web search is required, follow this priority order:

1. **First Choice: `multi-search-engine-2-0-1` skill**
   - Installed at: `skills/multi-search-engine-2-0-1/`
   - 17 search engines (8 CN + 9 Global)
   - No API key required
   - Supports: advanced search operators, time filters, site search, privacy engines, WolframAlpha

2. **Second Choice: Web Search Prime MCP** (`mcp_web-search-prime_*`)
   - Provided by Zhipu AI
   - Requires API key (configured in config.json)
   - Use only if multi-search-engine is not available