siblingssoftware.com.ar WebMCP audit

Name: siblingssoftware.com.ar WebMCP audit
Creator: ora

Rescan

audited Aug 28, 2026in 5s

54/ 100

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

WebMCP use74

Usefulness50

Human experience13

about:blank

No agent run recorded yet.

No steps recorded

Tools

get_company_profile

Returns Siblings Software company profile, delivery model, ideal buyers, and contact channels.Takes an action on the site.

pagehttps://siblingssoftware.com.ar/

implementation

viaimperative

entry pointnavigator

registered after723ms

executepresent

api surfaceTakes no parameters.

annotations

read onlynot declared

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: [/* ... */] });

failAnnotations present

0 / 4

7 of 7 tools declare no readOnlyHint, so an agent cannot tell a read from a write without guessing from the name.

get_company_profile, list_services, find_service_by_intent, compare_engagement_models, get_case_studies

fix

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

warningHuman parity

1 / 8

7 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.

get_company_profile, list_services, find_service_by_intent, compare_engagement_models, get_case_studies

fix

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

tool json

{
  "name": "get_company_profile",
  "description": "Returns Siblings Software company profile, delivery model, ideal buyers, and contact channels.",
  "inputSchema": {
    "type": "object",
    "properties": {}
  },
  "annotations": {}
}

Findings

WebMCP use

74 / 100 · weight 50

passTools registered

4 / 4

7 imperative tools and 1 declarative form 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 722.9000000953674ms of navigation. 1 further tool carried no measurable registration time.

toollist_services

failCanonical entry point

0 / 4

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

toolget_company_profile

fix

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

passSchema validity

5 / 5

All 7 tools declare a structurally valid object input schema.

warningSchema quality

2 / 4

4 of 8 tool schemas are harder for an agent to use than they need to be: list_services declares no required list, so an agent cannot tell which parameters are mandatory.

toollist_services

list_services: declares no required list, so an agent cannot tell which parameters are mandatory; compare_engagement_models: declares no required list, so an agent cannot tell which parameters are man

fix

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

passStub detection

5 / 5

All 7 tools declare an execute handler.

failAnnotations present

0 / 4

7 of 7 tools declare no readOnlyHint, so an agent cannot tell a read from a write without guessing from the name.

toolget_company_profile

get_company_profile, list_services, find_service_by_intent, compare_engagement_models, get_case_studies

fix

{
  name: "get_company_profile",
  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

7 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

50 / 100 · weight 30

warningNaming quality

1 / 2

Tool naming makes selection harder than it needs to be: names mix camel and snake conventions; 1 name does not start with a verb (contactSiblingsSoftware).

toolcontactSiblingsSoftware

fix

{ name: "contactsiblingssoftware" /* 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.

warningCoverage vs. site type

4 / 8

The tool set covers 2 of the 4 things an agent needs on a saas site; it cannot create a record or start a job or update or move an existing record.

Human experience

13 / 100 · weight 20

warningHuman parity

1 / 8

toolget_company_profile

get_company_profile, list_services, find_service_by_intent, compare_engagement_models, get_case_studies

fix

<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="get_company_profile" 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