bema.jpamorgan.com WebMCP audit

Rescan
audited Aug 28, 2026in 3s
67/ 100

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

WebMCP use69
Usefulness75
Human experience50
about:blank

No agent run recorded yet.

No steps recorded

Tools

/
open_bema_episode: fail

open_bema_episode

Open the human-readable BEMA Podcast Explorer page for a known stable episode slug.Takes an action on the site.
pagehttps://bema.jpamorgan.com/
implementation
viaimperative
entry pointdocument
registered after134ms
executepresent
api surface
slugrequired
annotations
read onlynot declared
destructivenot declared
idempotentnot declared
open worldnot declared
untrusted contentnot declared
titlenot declared
4 findings
passRegistration timing
4 / 4
Every measured tool registered within 134.09999990463257ms of navigation. 1 further tool carried no measurable registration time.
warningNaming quality
1.5 / 2
Tool naming makes selection harder than it needs to be: 1 name does not start with a verb (open_bema_episode).
fix
{ name: "open_bema_episode" /* short, unique, verb-based */ }
failAnnotations present
0 / 4
1 of 1 tools declare no readOnlyHint, so an agent cannot tell a read from a write without guessing from the name.
open_bema_episode
fix
{
  name: "open_bema_episode",
  annotations: { readOnlyHint: true, destructiveHint: false, idempotentHint: true }
}
warningHuman parity
4 / 8
1 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.
open_bema_episode
fix
<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="open_bema_episode" tooldescription="...">
  <!-- the same action, as UI -->
</form>
tool json
{
  "name": "open_bema_episode",
  "description": "Open the human-readable BEMA Podcast Explorer page for a known stable episode slug.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "slug": {
        "type": "string",
        "description": "The stable episode slug returned by BEMA search, such as 74 or -1."
      }
    },
    "required": [
      "slug"
    ]
  },
  "annotations": {}
}
Showing open_bema_episode

Findings

WebMCP use

69 / 100 · weight 50
passTools registered
4 / 4
1 imperative tool and 1 declarative form 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. The 1 declarative form tool on the page stay usable regardless.
passRegistration timing
4 / 4
Every measured tool registered within 134.09999990463257ms of navigation. 1 further tool carried no measurable registration time.
toolopen_bema_episode
passCanonical entry point
4 / 4
The one registered tool registers on the canonical document.modelContext entry point.
passSchema validity
5 / 5
All 1 tool 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
The one registered tool declares an execute handler.
failAnnotations present
0 / 4
1 of 1 tools declare no readOnlyHint, so an agent cannot tell a read from a write without guessing from the name.
toolopen_bema_episode
open_bema_episode
fix
{
  name: "open_bema_episode",
  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
1 tool was 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

75 / 100 · weight 30
warningNaming quality
1.5 / 2
Tool naming makes selection harder than it needs to be: 1 name does not start with a verb (open_bema_episode).
toolopen_bema_episode
fix
{ name: "open_bema_episode" /* 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

50 / 100 · weight 20
warningHuman parity
4 / 8
1 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.
toolopen_bema_episode
open_bema_episode
fix
<!-- Give the tool a visible counterpart: a declarative form is one the person can see and use too. -->
<form toolname="open_bema_episode" 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
3s
finished
Aug 28, 2026