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ToolRegistry - JSON-structured function calling for MORPH-AI v6.
Provides tool registration, validation, and execution.
"""
import json
import re
from dataclasses import dataclass, field
from typing import Any, Callable, Dict, List, Optional
@dataclass
class ToolCall:
tool_name: str
arguments: Dict[str, Any]
confidence: float = 1.0
raw: str = ""
def to_dict(self) -> dict:
return {
"tool": self.tool_name,
"arguments": self.arguments,
"confidence": self.confidence,
}
@dataclass
class Tool:
name: str
description: str
parameters: Dict[str, Any]
handler: Callable
required: List[str] = field(default_factory=list)
class ToolRegistry:
"""Registry for tools that can be called by the model."""
def __init__(self):
self._tools: Dict[str, Tool] = {}
self._register_defaults()
def _register_defaults(self):
"""Register built-in tools."""
self.register(Tool(
name="calculator",
description="Evaluate a mathematical expression",
parameters={
"type": "object",
"properties": {
"expression": {"type": "string", "description": "Math expression to evaluate"}
},
"required": ["expression"]
},
handler=self._calc_handler,
required=["expression"]
))
self.register(Tool(
name="search",
description="Search the web for information",
parameters={
"type": "object",
"properties": {
"query": {"type": "string", "description": "Search query"}
},
"required": ["query"]
},
handler=self._search_handler,
required=["query"]
))
self.register(Tool(
name="code_exec",
description="Execute Python code safely",
parameters={
"type": "object",
"properties": {
"code": {"type": "string", "description": "Python code to execute"}
},
"required": ["code"]
},
handler=self._code_exec_handler,
required=["code"]
))
self.register(Tool(
name="current_time",
description="Get the current date and time",
parameters={
"type": "object",
"properties": {
"timezone": {"type": "string", "description": "Timezone (optional)"}
},
"required": []
},
handler=self._time_handler,
required=[]
))
def register(self, tool: Tool):
self._tools[tool.name] = tool
def get_tool_schema(self) -> str:
"""Return JSON schema of all registered tools for prompt injection."""
tools = []
for t in self._tools.values():
tools.append({
"name": t.name,
"description": t.description,
"parameters": t.parameters
})
return json.dumps(tools, indent=2)
def parse_calls(self, text: str) -> List[ToolCall]:
"""Extract JSON tool calls from model response."""
calls = []
pattern = r'```json\s*(\{.*?\})\s*```'
for m in re.finditer(pattern, text, re.DOTALL):
try:
data = json.loads(m.group(1))
if "tool" in data:
calls.append(ToolCall(
tool_name=data["tool"],
arguments=data.get("arguments", {}),
confidence=data.get("confidence", 1.0),
raw=m.group(1)
))
except json.JSONDecodeError:
continue
return calls
def validate(self, call: ToolCall) -> bool:
tool = self._tools.get(call.tool_name)
if not tool:
return False
for req in tool.required:
if req not in call.arguments:
return False
return True
def execute(self, call: ToolCall) -> str:
if not self.validate(call):
return f"Error: invalid tool call {call.tool_name}"
tool = self._tools[call.tool_name]
try:
result = tool.handler(**call.arguments)
return str(result)
except Exception as e:
return f"Error executing {call.tool_name}: {e}"
def _calc_handler(self, expression: str) -> Any:
try:
result = eval(expression, {"__builtins__": {}}, {})
return result
except Exception as e:
return f"Calculation error: {e}"
def _search_handler(self, query: str) -> str:
from search import SearchClient
client = SearchClient()
results = client.search(query, num=3)
return "\n".join(f"- {r.title}: {r.snippet}" for r in results)
def _code_exec_handler(self, code: str) -> str:
from architecture import CodeSandbox
sandbox = CodeSandbox()
result = sandbox.execute(code)
if result["success"]:
return f"Output: {result['output']}"
return f"Error: {result['error']}"
def _time_handler(self, timezone: Optional[str] = None) -> str:
from datetime import datetime, timezone as tz
import pytz
if timezone:
try:
tz_obj = pytz.timezone(timezone)
now = datetime.now(tz_obj)
except Exception:
now = datetime.now(tz.UTC)
else:
now = datetime.now()
return now.strftime("%Y-%m-%d %H:%M:%S %Z")
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