pickcrest.com WebMCP audit

Name: pickcrest.com WebMCP audit
Creator: ora

Rescan

audited Aug 28, 2026in 4s

62/ 100

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

WebMCP use74

Usefulness83

Human experience0

about:blank

No agent run recorded yet.

No steps recorded

Tools

find_cat_toy_guide

Find the most relevant PickCrest cat gear guide for a shopper need, including catio, renter, window, balcony, yard, fit, permission, indoor enrichment, puzzle feeders, automatic toys, or starter kits.Takes an action on the site.

pagehttps://pickcrest.com/

implementation

viaimperative

entry pointnavigator

registered after256ms

executepresent

api surface

needrequired

limitoptional

annotations

read onlynot declared

destructivenot declared

idempotentnot declared

open worldnot declared

untrusted contentnot declared

titlenot declared

4 findings

failCanonical entry point

0 / 4

Every tool registers through the deprecated navigator.modelContext alias; move them to document.modelContext before the alias is removed.

fix

// Use the canonical entry point - navigator.modelContext is deprecated.
document.modelContext.provideContext({ tools: [/* ... */] });

warningSchema quality

2 / 4

3 of 6 tool schemas are harder for an agent to use than they need to be: find_cat_toy_guide 1 parameter description is over Chrome's 150-character guidance.

find_cat_toy_guide: 1 parameter description is over Chrome's 150-character guidance; list_cat_toy_guides: declares no required list, so an agent cannot tell which parameters are mandatory; get_page_sh

fix

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

failAnnotations present

0 / 4

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

find_cat_toy_guide, list_cat_toy_guides, get_top_cat_toy_affiliate_links, get_page_shopping_paths, get_cat_toy_recommendation_flow

fix

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

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.

find_cat_toy_guide, list_cat_toy_guides, get_top_cat_toy_affiliate_links, get_page_shopping_paths, get_cat_toy_recommendation_flow

fix

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

tool json

{
  "name": "find_cat_toy_guide",
  "description": "Find the most relevant PickCrest cat gear guide for a shopper need, including catio, renter, window, balcony, yard, fit, permission, indoor enrichment, puzzle feeders, automatic toys, or starter kits.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "need": {
        "type": "string",
        "description": "The shopper need or cat play style to match, for example: catio, renter, window, balcony, yard, no drill, cat ignores toys, bored indoor cat, puzzle feeder, automatic toy, or starter kit."
      },
      "limit": {
        "type": "number",
        "description": "Optional maximum number of guides. Defaults to 5."
      }
    },
    "required": [
      "need"
    ]
  },
  "annotations": {}
}

Findings

WebMCP use

74 / 100 · weight 50

passTools registered

4 / 4

6 tools registered across 1 page.

passReal-browser eligible

8 / 8

A real browser exposes modelContext natively on this page, so the tools registered here are visible to an agent today.

passRegistration timing

4 / 4

Every measured tool registered within 257.2999999523163ms of navigation.

toolget_cat_toy_recommendation_flow

failCanonical entry point

0 / 4

Every tool registers through the deprecated navigator.modelContext alias; move them to document.modelContext before the alias is removed.

toolfind_cat_toy_guide

fix

// Use the canonical entry point - navigator.modelContext is deprecated.
document.modelContext.provideContext({ tools: [/* ... */] });

passSchema validity

5 / 5

All 6 tools declare a structurally valid object input schema.

warningSchema quality

2 / 4

3 of 6 tool schemas are harder for an agent to use than they need to be: find_cat_toy_guide 1 parameter description is over Chrome's 150-character guidance.

toolfind_cat_toy_guide

find_cat_toy_guide: 1 parameter description is over Chrome's 150-character guidance; list_cat_toy_guides: declares no required list, so an agent cannot tell which parameters are mandatory; get_page_sh

fix

{
  name: "find_cat_toy_guide",
  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.

failAnnotations present

0 / 4

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

toolfind_cat_toy_guide

find_cat_toy_guide, list_cat_toy_guides, get_top_cat_toy_affiliate_links, get_page_shopping_paths, get_cat_toy_recommendation_flow

fix

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

not applicableAnnotation mismatch

0 / 3

No tool declares a readOnlyHint, so there is no safety claim to contradict.

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 are over Chrome's 30-character guidance.

toolget_top_cat_toy_affiliate_links

fix

{ name: "get_top_cat_toy_affiliate_links" /* 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

toolfind_cat_toy_guide

find_cat_toy_guide, list_cat_toy_guides, get_top_cat_toy_affiliate_links, get_page_shopping_paths, get_cat_toy_recommendation_flow

fix

<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="find_cat_toy_guide" 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: 4s
finished: Aug 28, 2026