ejaj.cz WebMCP audit

Rescan
audited Aug 28, 2026in 5s
77/ 100

8 tools registered. Strongest in WebMCP use, weakest in human experience.

WebMCP use98
Usefulness94
Human experience0
about:blank

No agent run recorded yet.

No steps recorded

Tools

/
search_ai_tools: warning

search_ai_tools

Hledá v katalogu 4600+ AI nástrojů na ejaj.cz podle textového dotazu, kategorie a cenového modelu. Vrací seznam nástrojů s krátkým popisem a odkazem.Answers a question. Declared read only.
pagehttps://www.ejaj.cz/
implementation
viaimperative
entry pointdocument
registered after302ms
executepresent
api surface
queryoptional
categoryoptional
priceoptional
sortoptional
limitoptional
annotations
read onlytrue
destructivenot declared
idempotentnot declared
open worldnot declared
untrusted contentnot declared
titlenot declared
1 finding
warningHuman parity
0 / 8
8 of 8 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.
search_ai_tools, get_ai_tool, list_ai_tool_categories, get_newest_ai_tools, get_ai_news
fix
<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="search_ai_tools" tooldescription="...">
  <!-- the same action, as UI -->
</form>
tool json
{
  "name": "search_ai_tools",
  "description": "Hledá v katalogu 4600+ AI nástrojů na ejaj.cz podle textového dotazu, kategorie a cenového modelu. Vrací seznam nástrojů s krátkým popisem a odkazem.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "query": {
        "type": "string",
        "description": "Hledaný výraz - název nebo popis nástroje."
      },
      "category": {
        "type": "string",
        "description": "Slug kategorie z list_ai_tool_categories, např. \"obecne-psani\" nebo \"copywriting\"."
      },
      "price": {
        "type": "string",
        "enum": [
          "free",
          "freemium",
          "free_trial",
          "paid",
          "contact"
        ],
        "description": "Filtr podle cenového modelu."
      },
      "sort": {
        "type": "string",
        "enum": [
          "popular",
          "newest",
          "name"
        ],
        "description": "Řazení výsledků, výchozí je popular."
      },
      "limit": {
        "type": "number",
        "description": "Počet výsledků, 1 až 25, výchozí 10."
      }
    },
    "required": []
  },
  "annotations": {
    "readOnlyHint": true
  }
}
Showing search_ai_tools

Findings

WebMCP use

98 / 100 · weight 50
passTools registered
4 / 4
8 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 302.2999999523163ms of navigation.
toolget_ai_tool
passCanonical entry point
4 / 4
All 8 tools register on the canonical document.modelContext entry point.
passSchema validity
5 / 5
All 8 tools declare a structurally valid object input schema.
passSchema quality
4 / 4
All 8 tool schemas describe their parameters and stay within Chrome's size guidance.
passStub detection
5 / 5
All 8 tools declare an execute handler.
passAnnotations present
4 / 4
All 8 tools declare a readOnlyHint, so an agent knows which calls change state.
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
8 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

94 / 100 · weight 30
warningNaming quality
1.9 / 2
Tool naming makes selection harder than it needs to be: 1 name does not start with a verb (open_in_catalog).
toolopen_in_catalog
fix
{ name: "open_in_catalog" /* 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
8 of 8 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.
toolsearch_ai_tools
search_ai_tools, get_ai_tool, list_ai_tool_categories, get_newest_ai_tools, get_ai_news
fix
<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="search_ai_tools" 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
8
run time
5s
finished
Aug 28, 2026