ToolBox Plugin Reference

All ToolBox classes implement the abstract ToolBox base from OPM (agent_tools.py:56). Each registers under opm.agents.toolbox and implements the single required method discover_tools() -> List[AgentTool].

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SkillMDToolBox

Entry point ID: ovos-skill-md-toolbox Source: ovos_agentic_loop/skills/toolbox.py:48

Converts installed SKILL.md files into AgentTool instances. Each SKILL.md yields one tool; tool execution calls a sub-ChatEngine with the SKILL.md body as the system prompt.

Tool: (one per SKILL.md, dynamically generated)

Tool name is slugified from the SKILL.md name frontmatter field via _slugify() — toolbox.py:12:

• Lower-case, non-alphanumeric characters replaced with underscores, leading/trailing underscores stripped.
• Example: "web-search" → "web_search".

Argument	Type	Required	Description
task	str	yes	Free-text instruction for the skill
context	str	no	Additional context or constraints

Output field	Type	Description
result	str	Natural-language response from the sub-LLM
skill_used	str	The SKILL.md name field of the invoked skill

Tool Execution (_invoke_skill) — toolbox.py:96

1. Raises RuntimeError if no brain has been set.
2. Builds user content: args.task if no context, else "{task}\n\nContext: {context}".
3. Assembles [SYSTEM: <skill body>, USER: <user_content>] and calls self._brain.continue_chat(messages).
4. Returns SkillCallOutput(result=response.content, skill_used=entry.name).

Config Keys

Key	Type	Default	Description
extra_skill_md_paths	List[str]	[]	Additional SKILL.md paths to load

Brain Injection

set_brain(brain: ChatEngine) — toolbox.py:87. Must be called before any tool invocation. The owning ReActLoopEngine does not auto-share its brain; manual wiring is required (see AUDIT ISSUE-002).

Example Persona Config

{
  "ovos-skill-md-toolbox": {
    "extra_skill_md_paths": ["/home/user/custom/SKILL.md"]
  }
}

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FileSystemToolBox

Entry point ID: ovos-filesystem-tools Source: ovos_agentic_loop/tools/filesystem.py:85

Provides five tools for local filesystem interaction.

Tool: read_file

Argument	Type	Required	Description
path	str	yes	Absolute or relative path to read

Output field	Type	Description
content	str	UTF-8 file contents or error message
path	str	Resolved absolute path

On any Exception, returns the exception message in content rather than raising — filesystem.py:127.

Tool: write_file

Guarded by allow_write config flag — filesystem.py:140.

Argument	Type	Required	Description
path	str	yes	Target file path (parent dirs created automatically)
content	str	yes	UTF-8 text to write

Output field	Type	Description
success	bool	True if write succeeded
path	str	Resolved absolute path
message	str	Human-readable status

When allow_write=False, the tool is still registered in discover_tools() — filesystem.py:264 — with a description noting it is disabled, so the LLM knows the tool exists but is unavailable. The _write_file handler checks the flag at call time and returns success=False.

Tool: list_directory

Argument	Type	Default	Description
path	str	—	Directory to list
pattern	str	"*"	Shell glob filter

Output field	Type	Description
entries	List[str]	Matching filesystem entry paths (sorted)
path	str	Resolved directory path

Tool: search_in_files

Argument	Type	Default	Description
pattern	str	—	Regular expression to search
path	str	"."	Root directory
glob	str	"**/*"	Glob to select files

Output field	Type	Description
matches	List[Dict]	Each dict: {file, line_number, line}
total	int	Count of matching lines

Invalid regex returns empty results without raising — filesystem.py:186.

Tool: find_files

Argument	Type	Default	Description
glob	str	—	Glob pattern (e.g. **/*.py)
path	str	"."	Root directory

Output field	Type	Description
files	List[str]	Matched file paths (files only, sorted)
total	int	Count of matched files

Config Keys

Key	Type	Default	Description
allow_write	bool	True	Set to False for read-only agents

Example Persona Config

{
  "ovos-filesystem-tools": {
    "allow_write": false
  }
}

---

ShellToolBox

Entry point ID: ovos-shell-tools Source: ovos_agentic_loop/tools/shell.py:26

Exposes one tool for executing shell commands.

Tool: run_command

Uses subprocess.run(..., shell=True, ...) — shell.py:75.

Argument	Type	Default	Description
command	str	—	Shell command to execute
cwd	str	"."	Working directory
timeout	int	30	Requested timeout (seconds); capped at max_timeout config

Output field	Type	Description
stdout	str	Standard output
stderr	str	Standard error (also used for error messages when blocked/timed-out)
returncode	int	Exit code (-1 on timeout or error)
success	bool	True if returncode == 0

Timeout cap: effective_timeout = min(args.timeout, config["max_timeout"]) — shell.py:72.

On TimeoutExpired, returns returncode=-1 and a message in stderr — shell.py:90.

When allow_shell=False, returns immediately with returncode=-1 and "Shell execution is disabled" in stderr — shell.py:63.

Config Keys

Key	Type	Default	Description
allow_shell	bool	False	Must be explicitly set to True to enable execution
max_timeout	int	120	Maximum allowed timeout in seconds
allowed_commands	list[str]	[]	Permitted command prefixes. Empty = all allowed. Non-empty = only matching prefixes execute — shell.py:85

When allowed_commands is non-empty, the first word of the command is matched against each prefix. Non-matching commands return returncode=-1 and "not permitted" in stderr without any subprocess execution.

Security Note

shell=True passes the command string directly to /bin/sh. Always combine allow_shell: true with a tight allowed_commands list in production environments.

Example Persona Config

{
  "ovos-shell-tools": {
    "allow_shell": true,
    "allowed_commands": ["git", "ls", "cat"],
    "max_timeout": 30
  }
}

---

WebSearchToolBox

Entry point ID: ovos-web-search-tools Source: ovos_agentic_loop/tools/web.py:25

DuckDuckGo text search. Requires optional dependency duckduckgo-search>=6.0.

Install: pip install 'ovos-agentic-loop[web]'

Tool: web_search

Argument	Type	Default	Description
query	str	—	Search query string
max_results	int	5	Maximum results to return

Output field	Type	Description
results	List[Dict]	Each dict: {title, url, snippet}
query	str	The query that was executed

If duckduckgo-search is not installed, returns one result with title="Package not installed" and an install instruction in snippet — web.py:65. No exception is raised; the LLM receives a friendly error observation.

If the search call itself fails, returns one result with title="Search error" and the exception message in snippet — web.py:93.

URL field normalisation: tries r.get("href", r.get("url", "")) to handle API key differences across package versions — web.py:84.

Config Keys

None. The config dict is accepted but unused.

Example Persona Config

{
  "ovos-web-search-tools": {}
}

---

ClockToolBox

Entry point ID: ovos-clock-tools Source: ovos_agentic_loop/tools/clock.py:22

No external dependencies. Returns the current system date and time.

Tool: get_current_datetime

No input arguments.

Output field	Type	Description
iso	str	Full ISO-8601 datetime with timezone offset
date	str	YYYY-MM-DD
time	str	HH:MM:SS
timezone	str	System timezone name (e.g. "UTC", "EST") or UTC offset string

Implementation: datetime.now().astimezone() — clock.py:53. Timezone name falls back to str(now.utcoffset()) if tzname() returns empty — clock.py:54.

Config Keys

None.

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MathToolBox

Entry point ID: ovos-math-tools Source: ovos_agentic_loop/tools/math.py

Safe mathematical operations. No external dependencies required for three of the four tools; solve_equation uses sympy when installed.

Tool: evaluate_expression

Argument	Type	Required	Description
expression	str	yes	Math expression string

Output field	Type	Description
result	float	Numeric result (nan on error)
expression	str	Original input
error	str|None	Error message on failure

Evaluation uses ast.parse + a whitelist of operators and functions — no eval() — math.py:71. Supported: +, -, *, /, //, %, **, and functions abs, round, sqrt, ceil, floor, log, log10, log2, exp, sin, cos, tan, asin, acos, atan, atan2, degrees, radians, factorial, gcd, lcm. Constants: pi, e, tau, inf.

Tool: unit_convert

Argument	Type	Required	Description
value	float	yes	Numeric value to convert
from_unit	str	yes	Source unit (case-insensitive)
to_unit	str	yes	Target unit (case-insensitive)

Output field	Type	Description
result	float	Converted value
category	str	Measurement category
error	str|None	Error on failure

Supported categories: length, mass, volume, time, speed, area, data, temperature. Temperature uses affine conversion (Celsius/Fahrenheit/Kelvin); all others use SI-base linear factors — math.py:136. Incompatible categories return an error.

Tool: statistics_summary

Argument	Type	Required	Description
numbers	list[float]	yes	Values to summarise

Output field	Type	Description
count	int	Number of values
mean	float	Arithmetic mean
median	float	Median
stdev	float|None	Sample std deviation (None when n < 2)
minimum	float	Min value
maximum	float	Max value
total	float	Sum

Tool: solve_equation

Argument	Type	Required	Description
equation	str	yes	Python expression equal to zero (e.g. x**2 - 4)

Output field	Type	Description
solutions	list[float]	Real-valued roots
method	str	"symbolic" (sympy) or "numeric" (bisection fallback)
error	str|None	Error on failure

Tries sympy.solve first; falls back to bisection scan over [-1000, 1000] — math.py:375.

Config Keys

None.