heroleague.ai WebMCP audit

Name: heroleague.ai WebMCP audit
Creator: ora

Rescan

audited Aug 28, 2026in 7s

56/ 100

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

WebMCP use60

Usefulness88

Human experience0

about:blank

No agent run recorded yet.

No steps recorded

Tools

list_questions

List HAIL assessment questions for simple, professional, or advanced profile. Advanced (real-number telemetry) is always available — no Premium required. Each question includes tier (core|extended) and core_position. Payload also returns core_count, core_keys, and extended_order.Answers a question. Declared read only.

pagehttps://heroleague.ai/

implementation

viaimperative

entry pointnavigator

registered after834ms

executepresent

api surface

profileoptional

annotations

read onlytrue

destructivenot declared

idempotentnot declared

open worldnot declared

untrusted contentnot declared

titlenot declared

3 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

0 / 4

4 of 4 tool schemas are harder for an agent to use than they need to be: list_questions 1 parameter has no description (profile).

list_questions: 1 parameter has no description (profile); run_assessment: 6 parameters have no description (email, team_name, profile, answers); get_result: 1 parameter has no description (run_id); ge

fix

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

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_questions, run_assessment, get_result, get_playbook

fix

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

tool json

{
  "name": "list_questions",
  "description": "List HAIL assessment questions for simple, professional, or advanced profile. Advanced (real-number telemetry) is always available — no Premium required. Each question includes tier (core|extended) and core_position. Payload also returns core_count, core_keys, and extended_order.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "profile": {
        "type": "string",
        "enum": [
          "simple",
          "professional",
          "advanced"
        ]
      }
    }
  },
  "annotations": {
    "readOnlyHint": true
  }
}

Findings

WebMCP use

60 / 100 · weight 50

passTools registered

4 / 4

4 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 834.5ms of navigation.

toolrun_assessment

failCanonical entry point

0 / 4

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

toollist_questions

fix

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

passSchema validity

5 / 5

All 4 tools declare a structurally valid object input schema.

warningSchema quality

0 / 4

4 of 4 tool schemas are harder for an agent to use than they need to be: list_questions 1 parameter has no description (profile).

toollist_questions

list_questions: 1 parameter has no description (profile); run_assessment: 6 parameters have no description (email, team_name, profile, answers); get_result: 1 parameter has no description (run_id); ge

fix

{
  name: "list_questions",
  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.

passAnnotations present

4 / 4

All 4 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 (4 declared hints checked).

warningUntrusted content hint

0 / 2

1 of 1 tools look like they return text written by other people but declare no untrustedContentHint, so an agent will treat the response as the site speaking.

toolrun_assessment

run_assessment: profile, email

fix

{ name: "run_assessment", annotations: { untrustedContentHint: true } }

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 (run_assessment).

toolrun_assessment

fix

{ name: "run_assessment" /* 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_questions

list_questions, run_assessment, get_result, get_playbook

fix

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