{
  "type": "object",
  "required": [
    "topping"
  ],
  "properties": {
    "size": {
      "enum": [
        "Small",
        "Medium",
        "Large",
        "Extra Large"
      ],
      "type": "string"
    },
    "count": {
      "type": "integer",
      "maximum": 50,
      "minimum": 1,
      "description": "Number of toppings to add"
    },
    "topping": {
      "enum": [
        "🍕",
        "🍄",
        "🌿",
        "🍍",
        "🫑",
        "🥓",
        "🧅",
        "🫒",
        "🌽",
        "🌶️",
        "🐑"
      ],
      "type": "string"
    }
  }
}

manage_pizzadocument.modelContextregisterTool · 504ms

Manage pizza state

inputSchema

{
  "type": "object",
  "required": [
    "action"
  ],
  "properties": {
    "action": {
      "enum": [
        "remove_last",
        "reset"
      ],
      "type": "string"
    }
  }
}

remove_toppingdocument.modelContextregisterTool · 504ms

Remove a specific topping from the pizza

inputSchema

{
  "type": "object",
  "required": [
    "topping"
  ],
  "properties": {
    "all": {
      "type": "boolean",
      "description": "Remove all toppings of this type"
    },
    "topping": {
      "enum": [
        "🍕",
        "🍄",
        "🌿",
        "🍍",
        "🫑",
        "🥓",
        "🧅",
        "🫒",
        "🌽",
        "🌶️",
        "🐑"
      ],
      "type": "string"
    }
  }
}

set_pizza_sizedocument.modelContextregisterTool · 503ms

Set the pizza size directly or infer it based on the number of people.

inputSchema

{
  "type": "object",
  "properties": {
    "size": {
      "enum": [
        "Small",
        "Medium",
        "Large",
        "Extra Large"
      ],
      "type": "string",
      "description": "The specific size name."
    },
    "number_of_persons": {
      "type": "number",
      "description": "The number of people eating to help infer the correct size."
    }
  }
}

set_pizza_styledocument.modelContextregisterTool · 504ms

Set the style of the pizza (colors/theme)

inputSchema

{
  "type": "object",
  "required": [
    "style"
  ],
  "properties": {
    "style": {
      "enum": [
        "Classic",
        "Bianca",
        "BBQ",
        "Pesto",
        "Wales"
      ],
      "type": "string"
    }
  }
}

share_pizzadocument.modelContextregisterTool · 504ms

Get a shareable URL for the current pizza creation

inputSchema

{
  "type": "object",
  "properties": {}
}

toggle_layerdocument.modelContextregisterTool · 504ms

Control pizza layers (sauce, cheese). Use "add", "remove", or "toggle".

inputSchema

{
  "type": "object",
  "required": [
    "layer"
  ],
  "properties": {
    "layer": {
      "enum": [
        "sauce-layer",
        "cheese-layer"
      ],
      "type": "string"
    },
    "action": {
      "enum": [
        "add",
        "remove",
        "toggle"
      ],
      "type": "string"
    }
  }
}

Registration

30/60

Pass: Tools registered with JavaScript R1
20/20
7 tool(s) registered.
Tools: add_topping, manage_pizza, remove_topping, set_pizza_size, set_pizza_style, share_pizza, toggle_layer
First tool registered 503ms after the page started loading.
Pass: Tools registered through forms R2
5/5
No form tools, and that's fine: your tools are registered with JavaScript. You only need one of the two.
JavaScript tools: add_topping, manage_pizza, remove_topping, set_pizza_size, set_pizza_style, share_pizza, toggle_layer
Fail: Tools work when called R3
0/30
We couldn't test any tools. Skipped 7: add_topping (not marked read-only); manage_pizza (not marked read-only); remove_topping (not marked read-only); set_pizza_size (not marked read-only); set_pizza_style (not marked read-only); share_pizza (the name suggests it changes something); toggle_layer (not marked read-only)
We only call tools that just read information, so a scan never changes anything on your site. We need at least one of those to check that your tools work.
Fix: Mark tools that only read information with readOnlyHint: true, so we can test them.
annotations: { readOnlyHint: true } // only reads, safe to call
Pass: Tools registered within 5 seconds R4
5/5
First tool registered 503ms after the page started loading.
Within the 5 second limit.

Tool quality

5/15

Fail: Valid input schemas Q1
0/5
5 of 7 tool(s) have schema problems: • add_topping: no description on topping, size. • manage_pizza: no description on action. • remove_topping: no description on topping. • set_pizza_style: no description on style. • toggle_layer: no description on layer, action.
Agents read the schema to know what to send. A type and a short description on each field help them send the right thing.
Fix: Give every field a type and a short description.
inputSchema: { type: "object", properties: { query: { type: "string", description: "What to search for" }, limit: { type: "integer", description: "How many results to return (default 10)" } }, required: ["query"] }
set_pizza_size: 2 field(s), all described.
share_pizza: takes no input.
Pass: Clear descriptions Q2
3/3
All 7 tool(s) have a description.
add_topping: "Add one or more toppings to the pizza"
manage_pizza: "Manage pizza state"
remove_topping: "Remove a specific topping from the pizza"
set_pizza_size: "Set the pizza size directly or infer it based on the number of people."
set_pizza_style: "Set the style of the pizza (colors/theme)"
share_pizza: "Get a shareable URL for the current pizza creation"
toggle_layer: "Control pizza layers (sauce, cheese). Use "add", "remove", or "toggle"."
Pass: Clear names Q3
2/2
All 7 tool name(s) are specific.
Names: add_topping, manage_pizza, remove_topping, set_pizza_size, set_pizza_style, share_pizza, toggle_layer
Fail: Read-only hints Q4
0/3
7 of 7 tool(s) don't say whether they change anything: • add_topping: readOnlyHint isn't set. • manage_pizza: readOnlyHint isn't set. • remove_topping: readOnlyHint isn't set. • set_pizza_size: readOnlyHint isn't set. • set_pizza_style: readOnlyHint isn't set. • share_pizza: readOnlyHint isn't set. • toggle_layer: readOnlyHint isn't set.
readOnlyHint tells agents whether a tool only reads information or changes something. Agents can use read-only tools freely and check with the user before the rest.
Fix: Set readOnlyHint on every tool: true if it only reads, false if it changes something.
annotations: { readOnlyHint: true, untrustedContentHint: true // optional: results include text from users or other sites }
Not assessed: Result size Q5
0/2
No tool returned a result, so this wasn't checked.
Fix: Get a tool returning results first (see R3).

Ready for visitors

25/25

Pass: HTTPS with a valid certificate P1
5/5
The page uses HTTPS with a valid certificate.
Connected to googlechromelabs.github.io over HTTPS.
Issuer: Let's Encrypt
Valid until: Oct 31 23:38:01 2026 GMT
Pass: Origin trial token P2
15/15
Found an origin trial token in a meta tag, so Chrome turns WebMCP on for your visitors.
Token: AkSy8NN0hHVbV1Tcto9+K2cDotMP5NcgNobK+M8bhWqrxefn6KOq0cpv/Glx… (212 chars total)
Pass: No errors blocking tools P3
5/5
No errors stopped your tools from registering.
No Content-Security-Policy header.

Scan details

Requested: https://googlechromelabs.github.io/webmcp-tools/demos/pizza-maker/
Final URL: https://googlechromelabs.github.io/webmcp-tools/demos/pizza-maker/
HTTP status: 200
Page title: WebMCP zaMaker!
Load time: 1289ms
Total scan time: 4138ms
User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Registered tools

Registration

Tools registered with JavaScript R1

Tools registered through forms R2

Tools work when called R3

Tools registered within 5 seconds R4

Tool quality

Valid input schemas Q1

Clear descriptions Q2

Clear names Q3

Read-only hints Q4

Result size Q5

Ready for visitors

HTTPS with a valid certificate P1

Origin trial token P2

No errors blocking tools P3

Scan details