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H/M Content Credentials Evidence Verifier

net.hogarmas/content-credentials
Juridique et conformité Sécurité Public et accessible MCP 2025-11-25

Ce que fait ce MCP

Validates C2PA status codes and verifies content-credentials evidence, policy decisions, checksums, and audit chains.

Capacités

Outils

7 outils
create_content_credentials_policy_profile
Create a checksum-bound evidence policy profile
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.
Lecture seule Idempotent
Schéma d’entrée 
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'properties': {'name': {'type': 'string', 'maxLength': 120}, 'preset': {'enum': ['editorial-review', 'trusted-distribution', 'archive-preservation', 'open-research'], 'type': 'string'}, 'actions': {'type': 'object', 'description': 'Optional allow, review or hold overrides keyed by a published policy rule ID', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'enum': ['allow', 'review', 'hold'], 'type': 'string'}}, 'purpose': {'type': 'string', 'maxLength': 400}}}
get_content_credentials_capabilities
Read Content Credentials verification boundaries
Returns the free tools, byte limits, privacy behavior and interpretation boundaries before any evidence JSON is submitted.
Lecture seule Idempotent
Schéma d’entrée 
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'properties': {}}
run_content_credentials_self_check
Run the Content Credentials evidence self-check
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.
Lecture seule Idempotent
Schéma d’entrée 
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'properties': {}}
triage_c2pa_validation_statuses
Interpret C2PA 2.4 validation status codes
Classifies up to 200 C2PA validation status observations against the complete 2.4 standard catalog, flags class mismatches, separates custom codes and returns bounded remediation. Accepts codes or crJSON-style status groups; no media, URL fetching, authentication or payment.
Lecture seule Idempotent
Schéma d’entrée 
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'properties': {'codes': {'type': 'array', 'items': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'maxItems': 200, 'description': 'Unclassified C2PA status code strings'}, 'statusCodes': {'type': 'object', 'properties': {'failure': {'type': 'array', 'items': {'anyOf': [{'type': 'string', 'maxLength': 160, 'minLength': 1}, {'type': 'object', 'required': ['code'], 'properties': {'url': {'type': 'string', 'maxLength': 2048}, 'code': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'explanation': {'type': 'string', 'maxLength': 2000}}}]}, 'maxItems': 200}, 'success': {'type': 'array', 'items': {'anyOf': [{'type': 'string', 'maxLength': 160, 'minLength': 1}, {'type': 'object', 'required': ['code'], 'properties': {'url': {'type': 'string', 'maxLength': 2048}, 'code': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'explanation': {'type': 'string', 'maxLength': 2000}}}]}, 'maxItems': 200}, 'informational': {'type': 'array', 'items': {'anyOf': [{'type': 'string', 'maxLength': 160, 'minLength': 1}, {'type': 'object', 'required': ['code'], 'properties': {'url': {'type': 'string', 'maxLength': 2048}, 'code': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'explanation': {'type': 'string', 'maxLength': 2000}}}]}, 'maxItems': 200}}, 'description': 'crJSON-style success, informational and failure arrays'}}}
Schéma de sortie 
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['schema', 'ruleset', 'state', 'summary', 'counts', 'affectedDomains', 'items', 'source', 'privacy', 'limitations'], 'properties': {'items': {'type': 'array', 'items': {'type': 'object', 'required': ['code', 'classification', 'effectiveClass', 'standardClass', 'observedClasses', 'classMismatch', 'occurrences', 'domain', 'scope', 'meaning', 'nextAction', 'submittedContext'], 'properties': {'code': {'type': 'string'}, 'scope': {'type': 'string'}, 'domain': {'type': 'string'}, 'meaning': {'type': 'string'}, 'nextAction': {'type': 'string'}, 'occurrences': {'type': 'integer', 'maximum': 9007199254740991, 'exclusiveMinimum': 0}, 'classMismatch': {'type': 'boolean'}, 'standardClass': {'anyOf': [{'enum': ['success', 'informational', 'failure'], 'type': 'string'}, {'type': 'null'}]}, 'classification': {'enum': ['standard', 'custom-or-unknown', 'invalid-format'], 'type': 'string'}, 'effectiveClass': {'enum': ['success', 'informational', 'failure', 'unclassified'], 'type': 'string'}, 'observedClasses': {'type': 'array', 'items': {'enum': ['success', 'informational', 'failure'], 'type': 'string'}}, 'submittedContext': {'type': 'object', 'required': ['urlPresent', 'explanationPresent', 'returned'], 'properties': {'returned': {'type': 'boolean', 'const': False}, 'urlPresent': {'type': 'boolean'}, 'explanationPresent': {'type': 'boolean'}}, 'additionalProperties': False}}, 'additionalProperties': False}}, 'state': {'enum': ['no-status-codes', 'failure-observed', 'review-required', 'vendor-review-required', 'informational-review', 'no-standard-failure-observed'], 'type': 'string'}, 'counts': {'type': 'object', 'required': ['observations', 'uniqueCodes', 'success', 'informational', 'failure', 'unclassified', 'standard', 'customOrUnknown', 'invalidFormat', 'classMismatches'], 'properties': {'failure': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}, 'success': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}, 'standard': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}, 'uniqueCodes': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}, 'observations': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}, 'unclassified': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}, 'informational': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}, 'invalidFormat': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}, 'classMismatches': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}, 'customOrUnknown': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}}, 'additionalProperties': False}, 'schema': {'type': 'string', 'const': 'hm.c2pa-status-triage.v1'}, 'source': {'type': 'object', 'required': ['specification', 'specificationVersion', 'statusCodeReference', 'crJsonReference', 'catalogEntries', 'license'], 'properties': {'license': {'type': 'string'}, 'specification': {'type': 'string'}, 'catalogEntries': {'type': 'number', 'const': 115}, 'crJsonReference': {'type': 'string'}, 'statusCodeReference': {'type': 'string'}, 'specificationVersion': {'type': 'string', 'const': '2.4'}}, 'additionalProperties': False}, 'privacy': {'type': 'object', 'required': ['sourceMediaAccepted', 'urlsReturned', 'submittedExplanationsReturned', 'inputPersistedByCore'], 'properties': {'urlsReturned': {'type': 'boolean', 'const': False}, 'sourceMediaAccepted': {'type': 'boolean', 'const': False}, 'inputPersistedByCore': {'type': 'boolean', 'const': False}, 'submittedExplanationsReturned': {'type': 'boolean', 'const': False}}, 'additionalProperties': False}, 'ruleset': {'type': 'string'}, 'summary': {'type': 'string'}, 'limitations': {'type': 'object', 'required': ['validatesAsset', 'validatesManifest', 'verifiesSignature', 'establishesSignerTrust', 'determinesTruth', 'infersCustomCodeMeaning', 'absenceOfFailureProvesValidity'], 'properties': {'validatesAsset': {'type': 'boolean', 'const': False}, 'determinesTruth': {'type': 'boolean', 'const': False}, 'validatesManifest': {'type': 'boolean', 'const': False}, 'verifiesSignature': {'type': 'boolean', 'const': False}, 'establishesSignerTrust': {'type': 'boolean', 'const': False}, 'infersCustomCodeMeaning': {'type': 'boolean', 'const': False}, 'absenceOfFailureProvesValidity': {'type': 'boolean', 'const': False}}, 'additionalProperties': False}, 'affectedDomains': {'type': 'array', 'items': {'type': 'object', 'required': ['domain', 'codes', 'failures'], 'properties': {'codes': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}, 'domain': {'type': 'string'}, 'failures': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}}, 'additionalProperties': False}}}, 'additionalProperties': False}
verify_content_credentials_audit
Verify an H/M audit evidence envelope
Checks report identity, source-report digest and the local custody hash chain. It does not prove operator identity, authorship or factual truth.
Lecture seule Idempotent
Schéma d’entrée 
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['envelope'], 'properties': {'envelope': {'type': 'object', 'description': 'Privacy-minimized H/M evidence JSON envelope. Source media is not accepted.', 'propertyNames': {'type': 'string'}, 'additionalProperties': {}}}}
verify_content_credentials_envelope
Verify an H/M evidence envelope checksum
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.
Lecture seule Idempotent
Schéma d’entrée 
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['envelope'], 'properties': {'envelope': {'type': 'object', 'description': 'Privacy-minimized H/M evidence JSON envelope. Source media is not accepted.', 'propertyNames': {'type': 'string'}, 'additionalProperties': {}}}}
verify_content_credentials_policy_decision
Verify an H/M evidence policy decision
Checks the policy checksum, decision checksum, every per-item rule outcome and aggregate counts. It does not inspect source media, authenticate the sender or certify compliance.
Lecture seule Idempotent
Schéma d’entrée 
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['decision'], 'properties': {'decision': {'type': 'object', 'description': 'H/M policy decision JSON exported by the browser-local Evidence Policy Lab', 'propertyNames': {'type': 'string'}, 'additionalProperties': {}}}}
Historique

Modifications récentes des outils

Ajouté
verify_content_credentials_policy_decision
17 September 2026 12:54
Ajouté
create_content_credentials_policy_profile
17 September 2026 12:54
Ajouté
verify_content_credentials_audit
17 September 2026 12:54
Ajouté
verify_content_credentials_envelope
17 September 2026 12:54
Ajouté
run_content_credentials_self_check
17 September 2026 12:54
Ajouté
triage_c2pa_validation_statuses
17 September 2026 12:54
Ajouté
get_content_credentials_capabilities
17 September 2026 12:54
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