counterfactual-phi.vercel.app
WebMCP-powered decision simulator
First seen 2026-11-05 · Last seen 2026-11-05 · Source: webmcp.com
Answer 1 · Act 7 · Transact 1 · Score: Not yet scored
Tool inspector
define_decision
Define or replace the decision the user is actually weighing — this is the whole point of the app, and it's the user's decision, not a fixed scenario. Give it a short name, an optional one-line description, and its all-in base cost. This resets the three canonical futures (Do It Now, Wait, Cheaper Alternative) around the new cost, but does not remove protected goals. Use this whenever the user describes a real decision they're facing, before forking any futures for it.
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
name |
string | yes | Short human-readable name for the decision, e.g. 'Buy a Tesla Model 3 in cash', 'Take 3 months unpaid leave', 'Put a deposit on a house'. |
description |
string | no | Optional one-line context for the decision. |
baseCost |
number | yes | All-in cost of doing this right now, in dollars. Used as the price for the 'Do It Now' and 'Wait' futures. |
Raw JSON schema
{
"type": "object",
"description": "Define or replace the decision being weighed. This does not execute anything — it just sets what the rest of the app compares futures against.",
"properties": {
"name": {
"type": "string",
"minLength": 1,
"description": "Short human-readable name for the decision, e.g. 'Buy a Tesla Model 3 in cash', 'Take 3 months unpaid leave', 'Put a deposit on a house'."
},
"description": {
"type": "string",
"description": "Optional one-line context for the decision."
},
"baseCost": {
"type": "number",
"minimum": 0,
"description": "All-in cost of doing this right now, in dollars. Used as the price for the 'Do It Now' and 'Wait' futures."
}
},
"required": [
"name",
"baseCost"
],
"additionalProperties": false
}
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