match-ai.nl WebMCP audit

Name: match-ai.nl WebMCP audit
Creator: ora

Rescan

audited Aug 28, 2026in 5s

65/ 100

10 tools registered. Strongest in usefulness, weakest in human experience.

WebMCP use70

Usefulness100

Human experience0

about:blank

No agent run recorded yet.

No steps recorded

Tools

/nl

get_match_ai_services

Geeft een overzicht van publieke Match-AI diensten en landingspagina’s.Answers a question. Declared read only.

pagehttps://match-ai.nl/nl

implementation

viaimperative

entry pointprovideContext

registered after306ms

executepresent

api surface

languageoptional

annotations

read onlytrue

destructivefalse

idempotentnot declared

open worldfalse

untrusted contentnot declared

titlenot declared

2 findings

warningSchema quality

2 / 4

5 of 10 tool schemas are harder for an agent to use than they need to be: get_match_ai_services 1 parameter has no description (language).

get_match_ai_services: 1 parameter has no description (language); get_match_ai_proposition: 1 parameter has no description (language); recommend_match_ai_use_cases: 4 parameters have no description (i

fix

{
  name: "get_match_ai_services",
  inputSchema: {
    type: "object",
    properties: {
      query: { type: "string", description: "What to search for" }
    },
    required: ["query"]
  }
}

warningHuman parity

0 / 8

10 of 10 tools run through the JavaScript API with no visible counterpart, so the person co-browsing cannot see what the agent is offered. Declarative forms (or at least a title annotation) close the gap.

get_match_ai_services, get_match_ai_proposition, recommend_match_ai_use_cases, get_match_ai_knowledge_links, start_match_ai_intake

fix

<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="get_match_ai_services" tooldescription="...">
  <!-- the same action, as UI -->
</form>

tool json

{
  "name": "get_match_ai_services",
  "description": "Geeft een overzicht van publieke Match-AI diensten en landingspagina’s.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "language": {
        "type": "string",
        "enum": [
          "nl",
          "en",
          "de"
        ]
      }
    }
  },
  "annotations": {
    "readOnlyHint": true,
    "destructiveHint": false,
    "openWorldHint": false
  }
}

Findings

WebMCP use

70 / 100 · weight 50

passTools registered

4 / 4

10 tools registered across 1 page.

failReal-browser eligible

0 / 8

The page's code registers these tools, but a real visitor's browser does not get them yet: WebMCP needs a native modelContext or a current origin trial token, and this page has neither.

passRegistration timing

4 / 4

Every measured tool registered within 306.80000019073486ms of navigation.

toolstart_match_ai_intake

passCanonical entry point

4 / 4

All 10 tools register on the canonical document.modelContext entry point.

passSchema validity

5 / 5

All 10 tools declare a structurally valid object input schema.

warningSchema quality

2 / 4

5 of 10 tool schemas are harder for an agent to use than they need to be: get_match_ai_services 1 parameter has no description (language).

toolget_match_ai_services

get_match_ai_services: 1 parameter has no description (language); get_match_ai_proposition: 1 parameter has no description (language); recommend_match_ai_use_cases: 4 parameters have no description (i

fix

{
  name: "get_match_ai_services",
  inputSchema: {
    type: "object",
    properties: {
      query: { type: "string", description: "What to search for" }
    },
    required: ["query"]
  }
}

passStub detection

5 / 5

All 10 tools declare an execute handler.

passAnnotations present

4 / 4

All 10 tools declare a readOnlyHint, so an agent knows which calls change state.

warningAnnotation mismatch

2.4 / 3

2 tools declare readOnlyHint: true although the name says the call writes (start_match_ai_intake).

toolstart_match_ai_intake

start_match_ai_intake: readOnlyHint=true; start_match_ai_intake: readOnlyHint=true

fix

// Set destructiveHint/idempotentHint to match what this tool actually does.
{ name: "start_match_ai_intake", annotations: { destructiveHint: true } }

not applicableUntrusted content hint

0 / 2

No tool's contract suggests it returns text written by somebody other than the site, so there is nothing to flag as untrusted.

failRegistration errors

0 / 2

10 tool registrations threw during the capture, so the registry an agent reads is incomplete.

duplicate tool name registered: get_match_ai_services

fix

try {
  document.modelContext.provideContext({ tools: [/* ... */] });
} catch (err) {
  console.error("WebMCP registration failed", err);
}

warningToolchange coherence

1 / 2

10 tools were registered but the page never dispatched a toolchange event, so an agent subscribed to registry updates never learns they exist.

fix

document.modelContext.dispatchEvent(new Event("toolchange"));

not applicableInjection surface

0 / 3

The injection-surface model hop returned no usable result, so tool contracts were not reviewed for injection surface.

Usefulness

100 / 100 · weight 30

passNaming quality

2 / 2

All 10 tool names are consistent, verb-led, and within Chrome's size guidance.

not applicableDescription quality

0 / 6

The description-quality model hop returned no usable result, so descriptions were not rated.

not applicableTool selection

0 / 14

The tool-selection model hop returned no usable result.

not applicableCoverage vs. site type

0 / 8

This tool set does not place the site in a category with a known expected tool shape, so there is no coverage baseline to score it against.

Human experience

0 / 100 · weight 20

warningHuman parity

0 / 8

toolget_match_ai_services

get_match_ai_services, get_match_ai_proposition, recommend_match_ai_use_cases, get_match_ai_knowledge_links, start_match_ai_intake

fix

<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="get_match_ai_services" tooldescription="...">
  <!-- the same action, as UI -->
</form>

not applicablePage experience

0 / 12

The page-experience model hop returned no usable result, so the page was not graded.

Tool selection

The tool-selection model hop returned no usable result.

how this was captured

chrome: 148.0.7778.96
capture shim: v1
spec snapshot: 2026-08
mode: fast
pages: 1
tools: 10
run time: 5s
finished: Aug 28, 2026