watchanchor.com WebMCP audit

Name: watchanchor.com WebMCP audit
Creator: ora

Rescan

audited Aug 28, 2026in 6s

63/ 100

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

WebMCP use76

Usefulness83

Human experience0

about:blank

No agent run recorded yet.

No steps recorded

Tools

searchWatches

Search the watch catalog by free-text keyword across brand, model, and reference number. When given a reference number, search with the reference ALONE (no brand). If no results, retry shorter: reference only, brand only, or model only. Do NOT use for calibre names or complications — use searchByMovement. Returns paginated results (brand, model, reference, photo, slug) and navigates the page to show them.Answers a question. Declared read only.

pagehttps://www.watchanchor.com/

implementation

viaimperative

entry pointdocument

registered after787ms

executepresent

api surface

queryrequired

pageoptional

annotations

read onlytrue

destructivenot declared

idempotentnot declared

open worldnot declared

untrusted contenttrue

titlenot declared

1 finding

warningHuman parity

0 / 8

6 of 6 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.

searchWatches, exploreWatches, searchByMovement, getFilterOptions, getWatchDetails

fix

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

tool json

{
  "name": "searchWatches",
  "description": "Search the watch catalog by free-text keyword across brand, model, and reference number. When given a reference number, search with the reference ALONE (no brand). If no results, retry shorter: reference only, brand only, or model only. Do NOT use for calibre names or complications — use searchByMovement. Returns paginated results (brand, model, reference, photo, slug) and navigates the page to show them.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "query": {
        "type": "string",
        "description": "A single search term: a brand name, model name, or reference number. Use the reference number alone when one is provided."
      },
      "page": {
        "type": "number",
        "description": "Page number for pagination, starts at 1"
      }
    },
    "required": [
      "query"
    ]
  },
  "annotations": {
    "readOnlyHint": true,
    "untrustedContentHint": true
  }
}

Findings

WebMCP use

76 / 100 · weight 50

passTools registered

4 / 4

6 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 786.9000000953674ms of navigation.

toolgetWatchDetails

passCanonical entry point

4 / 4

All 6 tools register on the canonical document.modelContext entry point.

passSchema validity

5 / 5

All 6 tools declare a structurally valid object input schema.

warningSchema quality

2.7 / 4

2 of 6 tool schemas are harder for an agent to use than they need to be: exploreWatches declares no required list, so an agent cannot tell which parameters are mandatory.

toolexploreWatches

exploreWatches: declares no required list, so an agent cannot tell which parameters are mandatory; getFilterOptions: declares no required list, so an agent cannot tell which parameters are mandatory

fix

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

passStub detection

5 / 5

All 6 tools declare an execute handler.

warningAnnotations present

3.3 / 4

1 of 6 tools declare no readOnlyHint, so an agent cannot tell a read from a write without guessing from the name.

toolsignIn

signIn

fix

{
  name: "signIn",
  annotations: { readOnlyHint: true, destructiveHint: false, idempotentHint: true }
}

passAnnotation mismatch

3 / 3

No tool claims to be read-only while its name says it writes (5 declared hints checked).

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.

passRegistration errors

2 / 2

No tool registration threw during the capture.

warningToolchange coherence

1 / 2

6 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

83 / 100 · weight 30

warningNaming quality

1.7 / 2

Tool naming makes selection harder than it needs to be: 2 names do not start with a verb (exploreWatches).

toolexploreWatches

fix

{ name: "explorewatches" /* short, unique, verb-based */ }

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

toolsearchWatches

searchWatches, exploreWatches, searchByMovement, getFilterOptions, getWatchDetails

fix

<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="searchwatches" 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: 6
run time: 6s
finished: Aug 28, 2026