jezersko.sk WebMCP audit

Rescan
audited Aug 28, 2026in 7s
66/ 100

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

WebMCP use72
Usefulness100
Human experience0
about:blank

No agent run recorded yet.

No steps recorded

Tools

/
get_accommodation: warning

get_accommodation

Returns basic information about Originálna drevenica JEZERSKO, including capacity, Wi-Fi, parking and pets policy.Answers a question. Declared read only.
pagehttps://www.jezersko.sk/
implementation
viaimperative
entry pointdocument
registered after810ms
executepresent
api surfaceTakes no parameters.
annotations
read onlytrue
destructivenot declared
idempotentnot declared
open worldnot declared
untrusted contentnot declared
titlenot declared
1 finding
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_accommodation, get_organization, get_contact, get_reservation_url, get_calendar_info
fix
<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="get_accommodation" tooldescription="...">
  <!-- the same action, as UI -->
</form>
tool json
{
  "name": "get_accommodation",
  "description": "Returns basic information about Originálna drevenica JEZERSKO, including capacity, Wi-Fi, parking and pets policy.",
  "inputSchema": {
    "type": "object",
    "properties": {}
  },
  "annotations": {
    "readOnlyHint": true
  }
}
Showing get_accommodation

Findings

WebMCP use

72 / 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. The page does carry an origin-trial token, but it does not grant WebMCP on this origin.
warningRegistration timing
2 / 4
The slowest tool took 1349.3000001907349ms to register, past the 1000ms an agent reading the registry at first paint would wait for.
toolstart_booking
start_booking: registered at 1349.3000001907349ms
fix
// Register tools as soon as they're ready, not behind a deferred/async chunk.
document.modelContext.provideContext({ tools: [/* ... */] });
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
3.2 / 4
2 of 10 tool schemas are harder for an agent to use than they need to be: find_next_available_period declares no required list, so an agent cannot tell which parameters are mandatory.
toolfind_next_available_period
find_next_available_period: declares no required list, so an agent cannot tell which parameters are mandatory; start_booking: declares no required list, so an agent cannot tell which parameters are ma
fix
{
  name: "find_next_available_period",
  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.
warningAnnotations present
3.2 / 4
2 of 10 tools declare no readOnlyHint, so an agent cannot tell a read from a write without guessing from the name.
toolget_contact_info
get_contact_info, start_booking
fix
{
  name: "get_contact_info",
  annotations: { readOnlyHint: true, destructiveHint: false, idempotentHint: true }
}
passAnnotation mismatch
3 / 3
No tool claims to be read-only while its name says it writes (8 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
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.
passCoverage vs. site type
8 / 8
The tool set covers the whole core travel flow: search trips or inventory, read one item in detail, book or hold a reservation, look up or change an existing booking.

Human experience

0 / 100 · weight 20
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.
toolget_accommodation
get_accommodation, get_organization, get_contact, get_reservation_url, get_calendar_info
fix
<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="get_accommodation" 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
7s
finished
Aug 28, 2026