Utility Matrix

Kubernetes Cluster Capacity Calculator

cluster-capacity-calculator

Read-onlyIdempotent

Use this when a user asks for Kubernetes cluster capacity. Uses the same node vCPU, node memory, node count, system reserve, and target utilization model as the browser calculator.

Input Schema

TableJSON Schema

Name	Required	Description
`node_vcpu`	Yes	node vcpu used by this deterministic tool.
`node_count`	Yes	node count used by this deterministic tool.
`node_mem_gb`	Yes	node mem in gigabytes.
`system_reserve_pct`	No	system reserve expressed as a percentage.
`target_utilization_pct`	No	target utilization expressed as a percentage.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`raw_vcpu`	Yes
`next_step`	Yes
`node_count`	Yes
`output_tier`	Yes
`usable_vcpu`	Yes
`signal_value`	Yes
`next_step_url`	Yes
`raw_memory_gb`	Yes
`remaining_pct`	Yes
`why_follow_up`	Yes
`interpretation`	Yes
`usable_memory_gb`	Yes
`affiliate_context`	No
`computation_basis`	Yes
`allocatable_factor`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed29 schema fields changedSep 28, 2026

addedInput schema / properties / node_count

Added value: +{
+  "description": "node count used by this deterministic tool.",
+  "examples": [
+    1
+  ],
+  "minimum": 1,
+  "type": "number"
+}

removedInput schema / properties / node_cpu

Removed value: -{
-  "type": "number"
-}

addedInput schema / properties / node_mem_gb

Added value: +{
+  "description": "node mem in gigabytes.",
+  "examples": [
+    0.001
+  ],
+  "minimum": 0.001,
+  "type": "number"
+}

removedInput schema / properties / node_memory_gb
```
Removed value: -{
-  "type": "number"
-}
```

addedInput schema / properties / node_vcpu

Added value: +{
+  "description": "node vcpu used by this deterministic tool.",
+  "examples": [
+    0.001
+  ],
+  "minimum": 0.001,
+  "type": "number"
+}

removedInput schema / properties / nodes

Removed value: -{
-  "type": "number"
-}

removedInput schema / properties / pod_cpu_m
```
Removed value: -{
-  "type": "number"
-}
```
removedInput schema / properties / pod_memory_mb
```
Removed value: -{
-  "type": "number"
-}
```

removedInput schema / properties / pods

Removed value: -{
-  "type": "number"
-}

addedInput schema / properties / system_reserve_pct

Added value: +{
+  "description": "system reserve expressed as a percentage.",
+  "examples": [
+    1
+  ],
+  "maximum": 99.999,
+  "minimum": 0,
+  "type": "number"
+}

addedInput schema / properties / target_utilization_pct

Added value: +{
+  "description": "target utilization expressed as a percentage.",
+  "examples": [
+    0.001
+  ],
+  "maximum": 100,
+  "minimum": 0.001,
+  "type": "number"
+}

changedInput schema / required

Previous value: -[
-  "nodes",
-  "node_cpu",
-  "node_memory_gb"
-]New value: +[
+  "node_vcpu",
+  "node_mem_gb",
+  "node_count"
+]

removedOutput schema / properties / allocatable_cpu_cores
```
Removed value: -{
-  "type": "number"
-}
```
addedOutput schema / properties / allocatable_factor
```
Added value: +{
+  "type": "number"
+}
```
removedOutput schema / properties / allocatable_memory_gb
```
Removed value: -{
-  "type": "number"
-}
```
addedOutput schema / properties / computation_basis
```
Added value: +{
+  "type": "string"
+}
```
removedOutput schema / properties / cpu_utilization_pct
```
Removed value: -{
-  "type": "number"
-}
```
removedOutput schema / properties / memory_utilization_pct
```
Removed value: -{
-  "type": "number"
-}
```
addedOutput schema / properties / node_count
```
Added value: +{
+  "type": "number"
+}
```
addedOutput schema / properties / output_tier
```
Added value: +{
+  "type": "string"
+}
```
removedOutput schema / properties / pressure_level
```
Removed value: -{
-  "type": "string"
-}
```
addedOutput schema / properties / raw_memory_gb
```
Added value: +{
+  "type": "number"
+}
```
addedOutput schema / properties / raw_vcpu
```
Added value: +{
+  "type": "number"
+}
```
addedOutput schema / properties / remaining_pct
```
Added value: +{
+  "type": "number"
+}
```
removedOutput schema / properties / severity
```
Removed value: -{
-  "type": "string"
-}
```
addedOutput schema / properties / signal_value
```
Added value: +{
+  "type": "number"
+}
```
addedOutput schema / properties / usable_memory_gb
```
Added value: +{
+  "type": "number"
+}
```
addedOutput schema / properties / usable_vcpu
```
Added value: +{
+  "type": "number"
+}
```

changedOutput schema / required

Previous value: -[
-  "allocatable_cpu_cores",
-  "allocatable_memory_gb",
-  "cpu_utilization_pct",
-  "interpretation",
-  "memory_utilization_pct",
-  "next_step",
-  "next_step_url",
-  "pressure_level",
-  "severity",
-  "why_follow_up"
-]New value: +[
+  "allocatable_factor",
+  "computation_basis",
+  "interpretation",
+  "next_step",
+  "next_step_url",
+  "node_count",
+  "output_tier",
+  "raw_memory_gb",
+  "raw_vcpu",
+  "remaining_pct",
+  "signal_value",
+  "usable_memory_gb",
+  "usable_vcpu",
+  "why_follow_up"
+]

Changed1 schema field changedJul 15, 2026

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"
+    },
+    "allocatable_cpu_cores": {
+      "type": "number"
+    },
+    "allocatable_memory_gb": {
+      "type": "number"
+    },
+    "cpu_utilization_pct": {
+      "type": "number"
+    },
+    "interpretation": {
+      "type": "string"
+    },
+    "memory_utilization_pct": {
+      "type": "number"
+    },
+    "next_step": {
+      "type": "string"
+    },
+    "next_step_url": {
+      "type": "string"
+    },
+    "pressure_level": {
+      "type": "string"
+    },
+    "severity": {
+      "type": "string"
+    },
+    "why_follow_up": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "allocatable_cpu_cores",
+    "allocatable_memory_gb",
+    "cpu_utilization_pct",
+    "interpretation",
+    "memory_utilization_pct",
+    "next_step",
+    "next_step_url",
+    "pressure_level",
+    "severity",
+    "why_follow_up"
+  ],
+  "type": "object"
+}

Changed1 schema field changedJul 13, 2026
- addedInput schema / additionalProperties
```
Added value: +false
```
First observedJun 29, 2026

TDQS

Score is being calculated.

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