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by io.github.helphub369
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Reserved Instance Breakeven Calculator

reserved-instance-breakeven
Read-onlyIdempotent

Use this when a user asks whether to buy Reserved Instances or stay on On-Demand, or how long an RI takes to pay for itself. Takes On-Demand and RI monthly costs plus optional upfront fees (0 when omitted). Judges the 1-year and 3-year terms separately and returns each break-even month and net saving. It recommends a term only when that term saves money over its own length, and prefers 3 years only when it beats three 1-year terms over 36 months at current prices.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
od_monthlyYesOn-Demand cost per month in USD.
ri_1yr_monthlyYes1-year Reserved Instance cost per month in USD, excluding the upfront fee.
ri_1yr_upfrontNo1-year upfront fee in USD; 0 when omitted (no-upfront RI).
ri_3yr_monthlyYes3-year Reserved Instance cost per month in USD, excluding the upfront fee.
ri_3yr_upfrontNo3-year upfront fee in USD; 0 when omitted (no-upfront RI).

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
severityYes
next_stepYes
next_step_urlYes
why_follow_upYes
interpretationYes
breakeven_monthsNo
recommended_termYes
affiliate_contextNo
computation_basisYes
net_savings_1yr_usdYes
net_savings_3yr_usdYes
breakeven_months_3yrNo
monthly_saving_1yr_usdYes
monthly_saving_3yr_usdYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed19 schema fields changed
    • changedInput schema / properties / od_monthly / description
      Previous value: -"od monthly used by this deterministic tool."New value: +"On-Demand cost per month in USD."
    • changedInput schema / properties / od_monthly / examples
      Previous value: -[
-  1
-]New value: +[
+  450
+]
    • addedInput schema / properties / od_monthly / exclusiveMinimum
      Added value: +0
    • changedInput schema / properties / ri_1yr_monthly / description
      Previous value: -"ri 1yr monthly used by this deterministic tool."New value: +"1-year Reserved Instance cost per month in USD, excluding the upfront fee."
    • changedInput schema / properties / ri_1yr_monthly / examples
      Previous value: -[
-  1
-]New value: +[
+  280
+]
    • addedInput schema / properties / ri_1yr_monthly / minimum
      Added value: +0
    • changedInput schema / properties / ri_1yr_upfront / description
      Previous value: -"ri 1yr upfront used by this deterministic tool."New value: +"1-year upfront fee in USD; 0 when omitted (no-upfront RI)."
    • changedInput schema / properties / ri_1yr_upfront / examples
      Previous value: -[
-  1
-]New value: +[
+  0
+]
    • addedInput schema / properties / ri_1yr_upfront / minimum
      Added value: +0
    • changedInput schema / properties / ri_3yr_monthly / description
      Previous value: -"ri 3yr monthly used by this deterministic tool."New value: +"3-year Reserved Instance cost per month in USD, excluding the upfront fee."
    • changedInput schema / properties / ri_3yr_monthly / examples
      Previous value: -[
-  1
-]New value: +[
+  180
+]
    • addedInput schema / properties / ri_3yr_monthly / minimum
      Added value: +0
    • changedInput schema / properties / ri_3yr_upfront / description
      Previous value: -"ri 3yr upfront used by this deterministic tool."New value: +"3-year upfront fee in USD; 0 when omitted (no-upfront RI)."
    • changedInput schema / properties / ri_3yr_upfront / examples
      Previous value: -[
-  1
-]New value: +[
+  0
+]
    • addedInput schema / properties / ri_3yr_upfront / minimum
      Added value: +0
    • addedOutput schema / properties / breakeven_months_3yr
      Added value: +{
+  "type": "number"
+}
    • addedOutput schema / properties / monthly_saving_1yr_usd
      Added value: +{
+  "type": "number"
+}
    • addedOutput schema / properties / monthly_saving_3yr_usd
      Added value: +{
+  "type": "number"
+}
    • changedOutput schema / required
      Previous value: -[
-  "computation_basis",
-  "interpretation",
-  "net_savings_1yr_usd",
-  "net_savings_3yr_usd",
-  "next_step",
-  "next_step_url",
-  "recommended_term",
-  "severity",
-  "why_follow_up"
-]New value: +[
+  "computation_basis",
+  "interpretation",
+  "monthly_saving_1yr_usd",
+  "monthly_saving_3yr_usd",
+  "net_savings_1yr_usd",
+  "net_savings_3yr_usd",
+  "next_step",
+  "next_step_url",
+  "recommended_term",
+  "severity",
+  "why_follow_up"
+]
  2. Changed1 schema field changed
    • changedOutput schema / required
      Previous value: -[
-  "breakeven_months",
-  "computation_basis",
-  "interpretation",
-  "net_savings_1yr_usd",
-  "net_savings_3yr_usd",
-  "next_step",
-  "next_step_url",
-  "recommended_term",
-  "severity",
-  "why_follow_up"
-]New value: +[
+  "computation_basis",
+  "interpretation",
+  "net_savings_1yr_usd",
+  "net_savings_3yr_usd",
+  "next_step",
+  "next_step_url",
+  "recommended_term",
+  "severity",
+  "why_follow_up"
+]
  3. Changed12 schema fields changed
    • addedInput schema / properties / od_monthly / description
      Added value: +"od monthly used by this deterministic tool."
    • addedInput schema / properties / od_monthly / examples
      Added value: +[
+  1
+]
    • addedInput schema / properties / ri_1yr_monthly / description
      Added value: +"ri 1yr monthly used by this deterministic tool."
    • addedInput schema / properties / ri_1yr_monthly / examples
      Added value: +[
+  1
+]
    • addedInput schema / properties / ri_1yr_upfront / description
      Added value: +"ri 1yr upfront used by this deterministic tool."
    • addedInput schema / properties / ri_1yr_upfront / examples
      Added value: +[
+  1
+]
    • addedInput schema / properties / ri_3yr_monthly / description
      Added value: +"ri 3yr monthly used by this deterministic tool."
    • addedInput schema / properties / ri_3yr_monthly / examples
      Added value: +[
+  1
+]
    • addedInput schema / properties / ri_3yr_upfront / description
      Added value: +"ri 3yr upfront used by this deterministic tool."
    • addedInput schema / properties / ri_3yr_upfront / examples
      Added value: +[
+  1
+]
    • addedOutput schema / properties / computation_basis
      Added value: +{
+  "type": "string"
+}
    • changedOutput schema / required
      Previous value: -[
-  "breakeven_months",
-  "interpretation",
-  "net_savings_1yr_usd",
-  "net_savings_3yr_usd",
-  "next_step",
-  "next_step_url",
-  "recommended_term",
-  "severity",
-  "why_follow_up"
-]New value: +[
+  "breakeven_months",
+  "computation_basis",
+  "interpretation",
+  "net_savings_1yr_usd",
+  "net_savings_3yr_usd",
+  "next_step",
+  "next_step_url",
+  "recommended_term",
+  "severity",
+  "why_follow_up"
+]
  4. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "additionalProperties": false,
+  "properties": {
+    "affiliate_context": {
+      "additionalProperties": false,
+      "properties": {
+        "affiliate": {
+          "type": "string"
+        },
+        "cta_label": {
+          "type": "string"
+        },
+        "disclosure": {
+          "type": "string"
+        },
+        "framing": {
+          "type": "string"
+        },
+        "posture": {
+          "enum": [
+            "secondary"
+          ],
+          "type": "string"
+        },
+        "slot_id": {
+          "type": "string"
+        },
+        "url": {
+          "type": "string"
+        },
+        "variant": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "affiliate",
+        "cta_label",
+        "disclosure",
+        "framing",
+        "posture",
+        "slot_id",
+        "url",
+        "variant"
+      ],
+      "type": "object"
+    },
+    "breakeven_months": {
+      "type": "number"
+    },
+    "interpretation": {
+      "type": "string"
+    },
+    "net_savings_1yr_usd": {
+      "type": "number"
+    },
+    "net_savings_3yr_usd": {
+      "type": "number"
+    },
+    "next_step": {
+      "type": "string"
+    },
+    "next_step_url": {
+      "type": "string"
+    },
+    "recommended_term": {
+      "type": "string"
+    },
+    "severity": {
+      "type": "string"
+    },
+    "why_follow_up": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "breakeven_months",
+    "interpretation",
+    "net_savings_1yr_usd",
+    "net_savings_3yr_usd",
+    "next_step",
+    "next_step_url",
+    "recommended_term",
+    "severity",
+    "why_follow_up"
+  ],
+  "type": "object"
+}
  5. Changed1 schema field changed
    • addedInput schema / additionalProperties
      Added value: +false
  6. First observed

TDQS

Score is being calculated.

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