check_performance_budget
Audit website performance against predefined thresholds for metrics like FCP, LCP, TBT, CLS, and Speed Index to ensure compliance with performance budgets.
Instructions
Check if website performance meets specified budget thresholds
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| budget | Yes | ||
| device | No | Device to emulate (default: desktop) | desktop |
| url | Yes | URL to audit |
Input Schema (JSON Schema)
{
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"properties": {
"budget": {
"additionalProperties": false,
"properties": {
"cumulativeLayoutShift": {
"description": "CLS budget",
"minimum": 0,
"type": "number"
},
"firstContentfulPaint": {
"description": "FCP budget in milliseconds",
"minimum": 0,
"type": "number"
},
"largestContentfulPaint": {
"description": "LCP budget in milliseconds",
"minimum": 0,
"type": "number"
},
"performanceScore": {
"description": "Score threshold (0-100)",
"maximum": 100,
"minimum": 0,
"type": "number"
},
"speedIndex": {
"description": "Speed Index budget in milliseconds",
"minimum": 0,
"type": "number"
},
"totalBlockingTime": {
"description": "TBT budget in milliseconds",
"minimum": 0,
"type": "number"
}
},
"type": "object"
},
"device": {
"default": "desktop",
"description": "Device to emulate (default: desktop)",
"enum": [
"desktop",
"mobile"
],
"type": "string"
},
"url": {
"description": "URL to audit",
"type": "string"
}
},
"required": [
"url",
"budget"
],
"type": "object"
}