roll_dice
Generate random dice rolls using standard notation to simulate dice-based games, probability calculations, or random number generation for various applications.
Instructions
Roll the dice with the given notation
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| notation | Yes | ||
| num_rolls | No |
Implementation Reference
- server.py:22-27 (handler)The primary MCP tool handler for 'roll_dice'. It is registered via @mcp.tool() decorator and delegates the rolling logic to DiceRoller class, returning its formatted string output.@mcp.tool() def roll_dice(notation: str, num_rolls: int = 1) -> str: """Roll the dice with the given notation""" roller = DiceRoller(notation, num_rolls) return str(roller)
- dice_roller.py:4-8 (helper)DiceRoller class initializer. Stores dice notation and number of rolls, compiles regex for parsing notation.class DiceRoller: def __init__(self, notation, num_rolls=1): self.notation = notation self.num_rolls = num_rolls self.dice_pattern = re.compile(r"(\d+)d(\d+)(k(\d+))?")
- dice_roller.py:10-23 (helper)Core method that parses the dice notation (e.g., 2d20k1), rolls the dice, sorts descending, keeps the highest N rolls, and returns all rolls and kept rolls.def roll_dice(self): match = self.dice_pattern.match(self.notation) if not match: raise ValueError("Invalid dice notation") num_dice = int(match.group(1)) dice_sides = int(match.group(2)) keep = int(match.group(4)) if match.group(4) else num_dice rolls = [random.randint(1, dice_sides) for _ in range(num_dice)] rolls.sort(reverse=True) kept_rolls = rolls[:keep] return rolls, kept_rolls
- dice_roller.py:37-47 (helper)String representation method called by the tool handler. Handles single or multiple rolls, formats the rolls and totals for output.def __str__(self): if self.num_rolls == 1: rolls, kept_rolls = self.roll_dice() return f"ROLLS: {', '.join(map(str, rolls))} -> RETURNS: {sum(kept_rolls)}" else: results = self.roll_multiple() result_strs = [] for i, result in enumerate(results, 1): result_strs.append(f"Roll {i}: ROLLS: {', '.join(map(str, result['rolls']))} -> RETURNS: {result['total']}") return "\n".join(result_strs)