inkle.ai WebMCP audit

Name: inkle.ai WebMCP audit
Creator: ora

Rescan

audited Aug 28, 2026in 7s

62/ 100

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

WebMCP use64

Usefulness100

Human experience0

about:blank

No agent run recorded yet.

No steps recorded

Tools

book_a_call

Open Inkle's scheduling page to book a call with the team (sales, tax, bookkeeping, incorporation, or sales tax).Takes an action on the site.

pagehttps://www.inkle.ai/

implementation

viaimperative

entry pointdocument

registered after673ms

executepresent

api surface

topicoptional

annotations

read onlynot declared

destructivenot declared

idempotentnot declared

open worldnot declared

untrusted contentnot declared

titlenot declared

3 findings

warningSchema quality

2 / 4

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

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

fix

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

failAnnotations present

0 / 4

2 of 2 tools declare no readOnlyHint, so an agent cannot tell a read from a write without guessing from the name.

book_a_call, start_signup

fix

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

warningHuman parity

0 / 8

2 of 2 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.

book_a_call, start_signup

fix

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

tool json

{
  "name": "book_a_call",
  "description": "Open Inkle's scheduling page to book a call with the team (sales, tax, bookkeeping, incorporation, or sales tax).",
  "inputSchema": {
    "type": "object",
    "properties": {
      "topic": {
        "type": "string",
        "description": "What the call is about, e.g. 'tax filing', 'bookkeeping', 'incorporation'."
      }
    }
  },
  "annotations": {}
}

Findings

WebMCP use

64 / 100 · weight 50

passTools registered

4 / 4

2 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 673.5ms of navigation.

toolstart_signup

passCanonical entry point

4 / 4

All 2 tools register on the canonical document.modelContext entry point.

passSchema validity

5 / 5

All 2 tools declare a structurally valid object input schema.

warningSchema quality

2 / 4

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

toolbook_a_call

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

fix

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

passStub detection

5 / 5

All 2 tools declare an execute handler.

failAnnotations present

0 / 4

2 of 2 tools declare no readOnlyHint, so an agent cannot tell a read from a write without guessing from the name.

toolbook_a_call

book_a_call, start_signup

fix

{
  name: "book_a_call",
  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

2 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 2 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.

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

toolbook_a_call

book_a_call, start_signup

fix

<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="book_a_call" 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: 2
run time: 7s
finished: Aug 28, 2026