publica.now WebMCP audit

Name: publica.now WebMCP audit
Creator: ora

Rescan

audited Aug 28, 2026in 8s

57/ 100

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

WebMCP use64

Usefulness83

Human experience0

about:blank

No agent run recorded yet.

No steps recorded

Tools

search_publica_now

Search the Publica Now catalog of independently published ebooks, audiobooks, music, and other creator works by title, topic, or creator name. Returns matching works with their canonical URLs.Takes an action on the site.

pagehttps://publica.now/

implementation

viaimperative

entry pointdocument

registered after1193ms

executepresent

api surface

queryrequired

annotations

read onlynot declared

destructivenot declared

idempotentnot declared

open worldnot declared

untrusted contentnot declared

titlenot declared

2 findings

failAnnotations present

0 / 4

3 of 3 tools declare no readOnlyHint, so an agent cannot tell a read from a write without guessing from the name.

search_publica_now, get_publica_now_pricing, list_publica_now_agent_resources

fix

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

warningHuman parity

0 / 8

3 of 3 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.

search_publica_now, get_publica_now_pricing, list_publica_now_agent_resources

fix

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

tool json

{
  "name": "search_publica_now",
  "description": "Search the Publica Now catalog of independently published ebooks, audiobooks, music, and other creator works by title, topic, or creator name. Returns matching works with their canonical URLs.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "query": {
        "type": "string",
        "maxLength": 500,
        "description": "Words to search for: a title, a topic, or a creator's name."
      }
    },
    "required": [
      "query"
    ]
  },
  "annotations": {}
}

Findings

WebMCP use

64 / 100 · weight 50

passTools registered

4 / 4

3 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.

warningRegistration timing

2 / 4

The slowest tool took 1193.5999999046326ms to register, past the 1000ms an agent reading the registry at first paint would wait for.

toolget_publica_now_pricing

get_publica_now_pricing: registered at 1193.5999999046326ms

fix

// Register tools as soon as they're ready, not behind a deferred/async chunk.
document.modelContext.provideContext({ tools: [/* ... */] });

passCanonical entry point

4 / 4

All 3 tools register on the canonical document.modelContext entry point.

passSchema validity

5 / 5

All 3 tools declare a structurally valid object input schema.

passSchema quality

4 / 4

All 3 tool schemas describe their parameters and stay within Chrome's size guidance.

passStub detection

5 / 5

All 3 tools declare an execute handler.

failAnnotations present

0 / 4

3 of 3 tools declare no readOnlyHint, so an agent cannot tell a read from a write without guessing from the name.

toolsearch_publica_now

search_publica_now, get_publica_now_pricing, list_publica_now_agent_resources

fix

{
  name: "search_publica_now",
  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

3 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

83 / 100 · weight 30

warningNaming quality

1.7 / 2

Tool naming makes selection harder than it needs to be: 1 name is over Chrome's 30-character guidance.

toollist_publica_now_agent_resources

fix

{ name: "list_publica_now_agent_resources" /* 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

toolsearch_publica_now

search_publica_now, get_publica_now_pricing, list_publica_now_agent_resources

fix

<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="search_publica_now" 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: 3
run time: 8s
finished: Aug 28, 2026