trickybird.com WebMCP audit

Name: trickybird.com WebMCP audit
Creator: ora

Rescan

audited Sep 7, 2026in 12s

99/ 100100% of the applicable check weight evaluated

4 tools registered. Strongest in shared experience, weakest in tool quality.

Shared experience100

Tool selection100

Tool quality99

Trust100

https://trickybird.com

Tools

2 read, 2 write

Loading map

open_site

Open a website through TrickyBird in this tab. The proxied page loads in place of this one. Returns ok (launch started), invalid_url (not a web address), busy (already launching), cancelled (call cancelled), failed (launch incomplete).Takes an action on the site.

pagehttps://trickybird.com/

implementation

viaimperative

entry pointdocument

registered after259ms

executepresent

api surface

urlrequired

annotations

read onlyfalse

untrusted contentnot declared

titlenot declared

open world (MCP-only)true

1 finding

warningNaming quality

weight 2

Tool naming makes selection harder than it needs to be: 1 name does not start with a verb (open_site).

fix

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

tool json

{
  "name": "open_site",
  "description": "Open a website through TrickyBird in this tab. The proxied page loads in place of this one. Returns ok (launch started), invalid_url (not a web address), busy (already launching), cancelled (call cancelled), failed (launch incomplete).",
  "inputSchema": {
    "type": "object",
    "properties": {
      "url": {
        "type": "string",
        "description": "The address to open, with or without https://. Up to 2048 characters.",
        "pattern": "^(https?://)?[^\\s/]+(/\\S*)?$",
        "examples": [
          "example.com",
          "https://example.org/some/page"
        ],
        "maxLength": 2048
      }
    },
    "required": [
      "url"
    ]
  },
  "annotations": {
    "readOnlyHint": false,
    "openWorldHint": 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

100 / 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.

passTool selection

weight 12

An agent chose an existing, callable tool and built a schema-valid call for all 3 canonical intents, each matching the kind of tool its intent needs. Nothing was executed, so this verifies selection, not outcomes.

not applicableCoverage vs. site type

weight 7

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.

Tool quality

99 / 100 · weight 25

passRegistration timing

weight 1

Every measured tool registered within 260ms of navigation.

toollist_checked_sites

passCanonical entry point

weight 3

All 4 tools register on the canonical document.modelContext entry point.

passSchema validity

weight 4

All 4 declared input schemas are structurally valid object schemas.

passSchema quality

weight 4

All 2 of 4 tool schemas that declare parameters describe them (the other 2 declare 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 does not start with a verb (open_site).

toolopen_site

fix

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

passStub detection

weight 4

All 4 tools declare an execute handler.

passRegistration errors

weight 2

No tool registration threw during the capture.

passDescription quality

weight 5

All 4 rated tool descriptions say what the tool does, when to use it, and what it returns.

Trust

100 / 100 · weight 20

passAnnotations present

weight 5

All 2 read-shaped tools declare readOnlyHint: true - the one declared claim that lets an agent treat a call as safe to make without asking.

passAnnotation mismatch

weight 5

No tool claims to be read-only while its own name or description says it writes (4 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

100% across 3 intents

I want to open site on this site.ok

choseopen_siteexpected open sitekind matched

arguments

{
  "url": "example.com"
}

I want to cancel launch on this site.ok

chosecancel_launchexpected cancel launchkind matched

arguments

{}

I want to list checked sites on this site.ok

choselist_checked_sitesexpected list checked siteskind matched

arguments

{}

model: gemini-2.5-flash

Add the tools this site is missing

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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: native modelContext
chrome: 151.0.7922.34
capture shim: v3
spec snapshot: 2026-08-26
mode: fast
pages: 1 - entry page only
tools: 4
invoked: not invoked; a live audit calls them
run time: 12s
finished: Sep 7, 2026

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