spreadfront.com WebMCP audit

Name: spreadfront.com WebMCP audit
Creator: ora

Rescan

audited Sep 4, 2026in 13s

86/ 100100% of the applicable check weight evaluated

5 tools registered. Strongest in tool selection, weakest in trust.

Shared experience87

Tool selection100

Tool quality89

Trust62

https://spreadfront.com

Tools

3 read, 0 write, 2 undeclared

Loading map

get_spreadfront_info

Information about the SpreadFront platform (turn a Google Sheet into a hosted online store). Pick a topic to get just that section, or "all" for everything: overview (what it is, principles, signup + live demo store URL), how_it_works (3-step setup), agentic_commerce (how stores support AI agents), payments (how merchants get paid, 0% commission), docs (guide/manual/terms links). Returns JSON with the requested sections: {topic, product?: {name, url, what, signupUrl, demoStoreUrl, principles[]}, howItWorks?: string[], agentic?: string, payments?: string, docs?: {guide, manual, terms, refunds}}.Answers a question. Declared read only.

pagehttps://spreadfront.com/

implementation

viaimperative

entry pointdocument

registered after88ms

executepresent

api surface

topicoptional

annotations

read onlytrue

untrusted contentnot declared

titlenot declared

1 finding

warningSchema quality

weight 4

3 of 5 tool schemas are harder for an agent to use than they need to be: get_spreadfront_info description is 601 characters, over Chrome's 500-character guidance.

get_spreadfront_info: description is 601 characters, over Chrome's 500-character guidance; copy_template_sheet: description is 724 characters, over Chrome's 500-character guidance; start_free_store: d

fix

{
  name: "get_spreadfront_info",
  inputSchema: {
    type: "object",
    properties: {
      query: { type: "string", description: "What to search for" }
    },
    required: ["query"]
  }
}

tool json

{
  "name": "get_spreadfront_info",
  "description": "Information about the SpreadFront platform (turn a Google Sheet into a hosted online store). Pick a topic to get just that section, or \"all\" for everything: overview (what it is, principles, signup + live demo store URL), how_it_works (3-step setup), agentic_commerce (how stores support AI agents), payments (how merchants get paid, 0% commission), docs (guide/manual/terms links). Returns JSON with the requested sections: {topic, product?: {name, url, what, signupUrl, demoStoreUrl, principles[]}, howItWorks?: string[], agentic?: string, payments?: string, docs?: {guide, manual, terms, refunds}}.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "topic": {
        "type": "string",
        "enum": [
          "overview",
          "how_it_works",
          "agentic_commerce",
          "payments",
          "docs",
          "all"
        ],
        "description": "Which section to return. Default \"overview\"."
      }
    }
  },
  "annotations": {
    "readOnlyHint": true
  }
}

Findings

Shared experience

87 / 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

1 of 4 page-experience marks came back short: obstruction A cookie banner partially obscures the bottom of the page content..

obstruction: weak

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

89 / 100 · weight 25

passRegistration timing

weight 1

Every measured tool registered within 88ms of navigation.

toolsearch_docs

passCanonical entry point

weight 3

All 5 tools register on the canonical document.modelContext entry point.

passSchema validity

weight 4

All 5 declared input schemas are structurally valid object schemas.

warningSchema quality

weight 4

3 of 5 tool schemas are harder for an agent to use than they need to be: get_spreadfront_info description is 601 characters, over Chrome's 500-character guidance.

toolget_spreadfront_info

get_spreadfront_info: description is 601 characters, over Chrome's 500-character guidance; copy_template_sheet: description is 724 characters, over Chrome's 500-character guidance; start_free_store: d

fix

{
  name: "get_spreadfront_info",
  inputSchema: {
    type: "object",
    properties: {
      query: { type: "string", description: "What to search for" }
    },
    required: ["query"]
  }
}

warningNaming quality

weight 2

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

toolcopy_template_sheet

fix

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

passStub detection

weight 4

All 5 tools declare an execute handler.

passRegistration errors

weight 2

No tool registration threw during the capture.

passDescription quality

weight 5

All 5 rated tool descriptions say what the tool does, when to use it, and what it returns.

Trust

62 / 100 · weight 20

passAnnotations present

weight 5

All 3 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 (3 declared hints checked).

warningUntrusted content hint

weight 3

2 of 2 tools look like they return text written by other people but declare no untrustedContentHint, so an agent will treat the response as the site speaking.

toolcopy_template_sheet

copy_template_sheet: note, user; start_free_store: note, user, email

fix

{ name: "copy_template_sheet", annotations: { untrustedContentHint: true } }

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.

warningInjection surface

weight 3

2 of 5 tools carry instruction-shaped text in their own metadata: copy_template_sheet Description instructs agent on tool preference and call sequence.

toolcopy_template_sheet

copy_template_sheet: Description instructs agent on tool preference and call sequence; start_free_store: Description instructs agent on tool preference and call sequence

fix

{
  name: "copy_template_sheet",
  // Metadata DESCRIBES the tool - it never addresses the agent reading it.
  // Rewrite any name, description, title, or schema field description that
  // instructs the agent (which tool to prefer, what to output, rules to
  // ignore) so it states what the tool does and what it returns instead.
  description: "Searches the catalog and returns matching items with prices."
}

Tool selection

100% across 3 intents

I want to get spreadfront info on this site.ok

choseget_spreadfront_infoexpected get spreadfront infokind matched

arguments

{}

I want to search docs on this site.ok

chosesearch_docsexpected search docskind matched

arguments

{
  "query": ""
}

I want to copy template sheet on this site.ok

chosecopy_template_sheetexpected copy template sheetkind matched

arguments

{}

model: gemini-2.5-flash

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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: 5
invoked: not invoked; a live audit calls them
run time: 13s
finished: Sep 4, 2026

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

Listed in the community directory.