fieldrobin.com WebMCP audit

Name: fieldrobin.com WebMCP audit
Creator: ora

Rescan

audited Sep 22, 2026in 14s

73/ 100100% of the applicable check weight evaluated

3 tools registered. Strongest in shared experience, weakest in tool selection.

Shared experience100

Tool selection18

Tool quality75

Trust100

https://fieldrobin.com

Tools

3 read, 0 write

Loading map

fieldrobin-search-public-content

Searches approved public FieldRobin product content by keyword. It never searches private workspace or customer records.Answers a question. Declared read only.

pagehttps://fieldrobin.com/

implementation

viaimperative

entry pointnavigator

registered after706ms

executepresent

api surface

queryrequired

annotations

read onlytrue

untrusted contenttrue

titlenot declared

2 findings

warningCanonical entry point

weight 3

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

fix

// document.modelContext is the canonical entry point - the navigator.modelContext alias is deprecated.
document.modelContext.registerTool({ /* ... */ });

warningNaming quality

weight 2

Tool naming makes selection harder than it needs to be: 1 name is over Chrome's 30-character guidance; 3 names do not start with a verb (fieldrobin-search-public-content).

fix

{ name: "fieldrobin-search-public-content" /* short, unique, verb-based */ }

tool json

{
  "name": "fieldrobin-search-public-content",
  "description": "Searches approved public FieldRobin product content by keyword. It never searches private workspace or customer records.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "query": {
        "type": "string",
        "description": "A concise public product search query."
      }
    },
    "required": [
      "query"
    ],
    "additionalProperties": false
  },
  "annotations": {
    "readOnlyHint": true,
    "untrustedContentHint": true
  }
}

Findings

Shared experience

100 / 100 · weight 30

not applicableVisible effect

weight 6

Not invoked on this run: this audit did not call any tool. Scheduled re-audits only read the registry; a live audit from the report page calls the tools that declare readOnlyHint: true.

passPage experience

weight 16

The page a person sees holds up next to the agent surface: a working interface, visible actions, readable content, nothing in the way.

passHuman parity

weight 8

The person co-browsing can see and use this page - the same page the agent's tools act on.

Tool selection

18 / 100 · weight 25

not applicableInvoke success rate

weight 6

Not invoked on this run: this audit did not call any tool. Scheduled re-audits only read the registry; a live audit from the report page calls the tools that declare readOnlyHint: true.

failTool selection

weight 12

An agent chose an existing tool and built a schema-valid call that held up on 0 of 3 canonical intents; on "Find the record for a company called Northwind." no tool on the page served it. Nothing was executed, so this verifies selection, not outcomes.

warningCoverage vs. site type

weight 7

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.

Tool quality

75 / 100 · weight 25

passRegistration timing

weight 1

Every measured tool registered within 706ms of navigation.

toolfieldrobin-get-public-product

warningCanonical entry point

weight 3

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

toolfieldrobin-search-public-content

fix

// document.modelContext is the canonical entry point - the navigator.modelContext alias is deprecated.
document.modelContext.registerTool({ /* ... */ });

passSchema validity

weight 4

All 3 declared input schemas are structurally valid object schemas.

passSchema quality

weight 4

All 2 of 3 tool schemas that declare parameters describe them (the other 1 declares no parameters), and every description stays within Chrome's size guidance.

warningNaming quality

weight 2

Tool naming makes selection harder than it needs to be: 1 name is over Chrome's 30-character guidance; 3 names do not start with a verb (fieldrobin-search-public-content).

toolfieldrobin-search-public-content

fix

{ name: "fieldrobin-search-public-content" /* short, unique, verb-based */ }

passStub detection

weight 4

All 3 tools declare an execute handler.

failRegistration errors

weight 2

3 tool registrations threw during the capture, so the registry an agent reads is incomplete.

duplicate tool name registered: fieldrobin-search-public-content

fix

document.modelContext.registerTool({ /* ... */ }).catch(function (err) {
  console.error("WebMCP registration failed", err);
});

passDescription quality

weight 5

1 of 3 tool descriptions leave an agent guessing: fieldrobin-get-public-product Omits what comes back, and how it differs from search..

toolfieldrobin-get-public-product

fieldrobin-get-public-product: weak

Trust

100 / 100 · weight 20

not applicableAnnotations present

weight 5

No tool name reads like a read, and an absent readOnlyHint already defaults to "this may write" - the one hint worth declaring here is readOnlyHint: true on read tools, and this set has none to declare it on.

passAnnotation mismatch

weight 5

No tool claims to be read-only while its own name or description says it writes (3 declared hints checked).

not applicableUntrusted content hint

weight 3

No tool's contract suggests it returns text written by somebody other than the site, so there is nothing to flag as untrusted.

not applicableHint vs. observed

weight 4

Not invoked on this run: this audit did not call any tool. Scheduled re-audits only read the registry; a live audit from the report page calls the tools that declare readOnlyHint: true.

not applicableInjection surface

weight 3

No tool's metadata carries instruction-shaped text aimed at the agent reading it. This check only ever flags; it never credits a site.

Tool selection

0% across 3 intents

Find the record for a company called Northwind.missed

choseno toolexpected record searchkind not applicable

No tool was picked for this intent.

arguments

{}

Show me everything on that record.missed

choseno toolexpected record detailkind not applicable

No tool was picked for this intent.

arguments

{}

Create a new contact called Dana Reeve.missed

choseno toolexpected record createkind not applicable

No tool was picked for this intent.

arguments

{}

model: gemini-2.5-flash

Add the tools this site is missing

Our scanner reads your website and suggests the right WebMCP tools for it.

The open source webmcp plugin teaches your coding agent to audit a site, implement tools on document.modelContext, and verify them in a real browser. npx @ora-ai/webmcp-verify runs the verification on its own. No signup, no hosted service.

how this was captured

observed via: capture shim (Chromium 151.0.7922.34)
chrome: 151.0.7922.34
capture shim: v3
spec snapshot: 2026-08-26
mode: fast
pages: 1 - entry page only
tools: 3
invoked: not invoked; a live audit calls them
run time: 14s
finished: Sep 22, 2026

Checked the way in-browser agents discover tools: the top-level document's modelContext registry, read after the page settles.