pawelkubiak.dev WebMCP audit

Name: pawelkubiak.dev WebMCP audit
Creator: ora

Rescan

audited Aug 28, 2026in 5s

69/ 100

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

WebMCP use86

Usefulness88

Human experience0

about:blank

No agent run recorded yet.

No steps recorded

Tools

/about

list_pages

Lists navigable site pages and recent blog posts with paths.Takes an action on the site.

pagehttps://pawelkubiak.dev/about

implementation

viaimperative

entry pointdocument

registered after365ms

executepresent

api surface

sectionoptional

annotations

read onlynot declared

destructivenot declared

idempotentnot declared

open worldnot declared

untrusted contentnot declared

titlenot declared

3 findings

warningSchema quality

3 / 4

1 of 4 tool schemas are harder for an agent to use than they need to be: list_pages declares no required list, so an agent cannot tell which parameters are mandatory.

list_pages: declares no required list, so an agent cannot tell which parameters are mandatory

fix

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

failAnnotations present

0 / 4

4 of 4 tools declare no readOnlyHint, so an agent cannot tell a read from a write without guessing from the name.

list_pages, navigate, find_blog_posts, find_relevant_experience

fix

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

warningHuman parity

0 / 8

4 of 4 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.

list_pages, navigate, find_blog_posts, find_relevant_experience

fix

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

tool json

{
  "name": "list_pages",
  "description": "Lists navigable site pages and recent blog posts with paths.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "section": {
        "type": "string",
        "enum": [
          "site",
          "blog",
          "all"
        ],
        "description": "Which section to list. Defaults to all."
      }
    },
    "additionalProperties": false
  },
  "annotations": {}
}

Findings

WebMCP use

86 / 100 · weight 50

passTools registered

4 / 4

4 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 364.90000009536743ms of navigation.

toolnavigate

passCanonical entry point

4 / 4

All 4 tools register on the canonical document.modelContext entry point.

passSchema validity

5 / 5

All 4 tools declare a structurally valid object input schema.

warningSchema quality

3 / 4

1 of 4 tool schemas are harder for an agent to use than they need to be: list_pages declares no required list, so an agent cannot tell which parameters are mandatory.

toollist_pages

list_pages: declares no required list, so an agent cannot tell which parameters are mandatory

fix

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

passStub detection

5 / 5

All 4 tools declare an execute handler.

failAnnotations present

0 / 4

4 of 4 tools declare no readOnlyHint, so an agent cannot tell a read from a write without guessing from the name.

toollist_pages

list_pages, navigate, find_blog_posts, find_relevant_experience

fix

{
  name: "list_pages",
  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

4 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

88 / 100 · weight 30

warningNaming quality

1.8 / 2

Tool naming makes selection harder than it needs to be: 1 name does not start with a verb (navigate).

toolnavigate

fix

{ name: "navigate" /* 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

toollist_pages

list_pages, navigate, find_blog_posts, find_relevant_experience

fix

<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="list_pages" 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: 4
run time: 5s
finished: Aug 28, 2026