reflex.dev WebMCP audit

Name: reflex.dev WebMCP audit
Creator: ora

Rescan

audited Aug 28, 2026in 6s

52/ 100

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

WebMCP use73

Usefulness50

Human experience0

about:blank

No agent run recorded yet.

No steps recorded

Tools

navigate_reflex

Navigate to a path on reflex.dev (e.g. "/docs/getting-started/introduction", "/pricing", "/blog").Takes an action on the site.

pagehttps://reflex.dev/

implementation

viaimperative

entry pointnavigator

registered after302ms

executepresent

api surface

pathrequired

annotations

read onlyfalse

destructivenot declared

idempotentnot declared

open worldnot declared

untrusted contentfalse

titlenot declared

4 findings

passRegistration timing

4 / 4

Every measured tool registered within 302ms of navigation.

warningCanonical entry point

2 / 4

1 of 2 tools still register through the deprecated navigator.modelContext alias.

navigate_reflex

fix

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

warningNaming quality

1 / 2

Tool naming makes selection harder than it needs to be: 2 names do not start with a verb (navigate_reflex).

fix

{ name: "navigate_reflex" /* short, unique, verb-based */ }

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.

navigate_reflex, navigate_reflex

fix

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

tool json

{
  "name": "navigate_reflex",
  "description": "Navigate to a path on reflex.dev (e.g. \"/docs/getting-started/introduction\", \"/pricing\", \"/blog\").",
  "inputSchema": {
    "type": "object",
    "properties": {
      "path": {
        "type": "string",
        "description": "Path on reflex.dev, starting with \"/\"."
      }
    },
    "required": [
      "path"
    ]
  },
  "annotations": {
    "readOnlyHint": false,
    "untrustedContentHint": false
  }
}

Findings

WebMCP use

73 / 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 302ms of navigation.

toolnavigate_reflex

warningCanonical entry point

2 / 4

1 of 2 tools still register through the deprecated navigator.modelContext alias.

toolnavigate_reflex

navigate_reflex

fix

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

passSchema validity

5 / 5

All 2 tools declare a structurally valid object input schema.

passSchema quality

4 / 4

All 2 tool schemas describe their parameters and stay within Chrome's size guidance.

passStub detection

5 / 5

All 2 tools declare an execute handler.

passAnnotations present

4 / 4

All 2 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 (2 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.

warningRegistration errors

1 / 2

1 tool registration threw during the capture, so the registry an agent reads is incomplete.

duplicate tool name registered: navigate_reflex

fix

try {
  document.modelContext.provideContext({ tools: [/* ... */] });
} catch (err) {
  console.error("WebMCP registration failed", err);
}

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

50 / 100 · weight 30

warningNaming quality

1 / 2

Tool naming makes selection harder than it needs to be: 2 names do not start with a verb (navigate_reflex).

toolnavigate_reflex

fix

{ name: "navigate_reflex" /* 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

toolnavigate_reflex

navigate_reflex, navigate_reflex

fix

<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="navigate_reflex" 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: 6s
finished: Aug 28, 2026