H/M Content Credentials Evidence Verifier

by hogarmas.net · remote · no sign-in to list tools · v1.2.0 · published by net.hogarmas

Free C2PA 2.4 triage and reproducible official trust snapshot. No media, keys, or payment.

Changes · 6

Compare Registry entry

7 tools: 6 change things and 1 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone0Claude Code: ask
Changes things6Claude Code: ask: see these tools
Only reads1Claude Code: allow: see these tools

4 checks matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http content-credentials https://agents.hogarmas.net/mcp/content-credentials

Findings

Matches of fixed checks, with the text they matched.

2 warn2 info

Warnrun_content_credentials_self_check
The server marks "run_content_credentials_self_check" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "run_content_credentials_self_check" says "run": a word for a change.
What this check looks for
Warncreate_content_credentials_policy_profile
The server marks "create_content_credentials_policy_profile" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "create_content_credentials_policy_profile" says "create": a word for a change.
What this check looks for
Infoget_content_credentials_capabilities
The title mentions "Credentials".
Matched text
title: "Read Content Credentials verification boundaries"
What this check looks for
Inforun_content_credentials_self_check
The title mentions "Credentials".
Matched text
title: "Run the Content Credentials evidence self-check"
What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

7 tools

Changes things 6Creates or changes something that can be changed back.Claude Code: ask

create_content_credentials_policy_profileCreates one versioned policy profile from a fixed preset and optional rule overrides.1 finding
Why it is in this group
- The name "create_content_credentials_policy_profile" says "create": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "create_content_credentials_policy_profile" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "create_content_credentials_policy_profile" says "create": a word for a change.
  What this check looks for
Description, as the server wrote it
Creates one versioned policy profile from a fixed preset and optional rule overrides. It accepts no source media or evidence and does not authenticate the policy author.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
run_content_credentials_self_checkRuns a deterministic, zero-input check of valid evidence, tamper detection and audit-chain verification using a synthetic fixture.2 findings
Why it is in this group
- The name "run_content_credentials_self_check" says "run": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Info
  The title mentions "Credentials".
  Matched text
  title: "Run the Content Credentials evidence self-check"
  What this check looks for
- Warn
  The server marks "run_content_credentials_self_check" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "run_content_credentials_self_check" says "run": a word for a change.
  What this check looks for
Description, as the server wrote it
Runs a deterministic, zero-input check of valid evidence, tamper detection and audit-chain verification using a synthetic fixture. No source media or caller data is used.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
triage_c2pa_validation_statusesClassifies up to 200 C2PA validation status observations against the complete 2.4 standard catalog, flags class mismatches, separates custom codes and returns bounded remediation.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Classifies up to 200 C2PA validation status observations against the complete 2.4 standard catalog, flags class mismatches, separates custom codes and returns bounded remediation. Accepts codes or crJSON-style status groups; no media, URL fetching, authentication or payment.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
verify_content_credentials_auditChecks report identity, source-report digest and the local custody hash chain.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Checks report identity, source-report digest and the local custody hash chain. It does not prove operator identity, authorship or factual truth.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
verify_content_credentials_envelopeChecks the schema, privacy boundaries and canonical SHA-256 digest of an H/M evidence envelope.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Checks the schema, privacy boundaries and canonical SHA-256 digest of an H/M evidence envelope. It does not inspect source media or authenticate an issuer.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
verify_content_credentials_policy_decisionChecks the policy checksum, decision checksum, every per-item rule outcome and aggregate counts.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Checks the policy checksum, decision checksum, every per-item rule outcome and aggregate counts. It does not inspect source media, authenticate the sender or certify compliance.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

Only reads 1Looks things up and changes nothing.Claude Code: allow

get_content_credentials_capabilitiesReturns the free tools, byte limits, privacy behavior and interpretation boundaries before any evidence JSON is submitted.Reads private data1 finding
Why it is in this group
- The name "get_content_credentials_capabilities" says "get": a word for reading.
What it can reach
- private-dataThe name "get_content_credentials_capabilities" says "get" and "credential": it reads secrets.
Findings
- Info
  The title mentions "Credentials".
  Matched text
  title: "Read Content Credentials verification boundaries"
  What this check looks for
Description, as the server wrote it
Returns the free tools, byte limits, privacy behavior and interpretation boundaries before any evidence JSON is submitted.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged untrusted-input or outbound.

Reads private data1: Reads files, mail, messages, databases, secrets, calendars or repositories.; get_content_credentials_capabilities
Reads text others write0: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Install

Pinned to version 1.2.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http content-credentials https://agents.hogarmas.net/mcp/content-credentials

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__content-credentials__get_content_credentials_capabilities"
    ],
    "ask": [
      "mcp__content-credentials__triage_c2pa_validation_statuses",
      "mcp__content-credentials__run_content_credentials_self_check",
      "mcp__content-credentials__verify_content_credentials_envelope",
      "mcp__content-credentials__verify_content_credentials_audit",
      "mcp__content-credentials__create_content_credentials_policy_profile",
      "mcp__content-credentials__verify_content_credentials_policy_decision"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as content-credentials. Review it before you use it.

Capability tags behind 1 rule

mcp__content-credentials__get_content_credentials_capabilities private-data

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/net.hogarmas/content-credentials/changes.xml

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Anlyon alternative

6 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Source: MCP Registry. Synced Oct 21, 2026, 18:53 UTC.

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