Shipmail — the complete, unedited output of the deterministic mcptrustchecker engine v1.13.0, scanned . Every finding, capability tag and score component below is exactly what the engine produced — no AI, no post-processing.
{
"tool": {
"name": "mcptrustchecker",
"version": "1.13.0",
"methodologyVersion": "mcptrustchecker-1.13"
},
"target": {
"id": "shipmail-mcp",
"source": {
"kind": "package",
"origin": "shipmail-mcp"
},
"server": {
"name": "shipmail-mcp"
}
},
"grade": "A",
"score": {
"score": 97,
"threatScore": 100,
"grade": "A",
"band": "A",
"categorySubtotals": {
"injection": 0,
"exfiltration": 0,
"permissions": 0,
"supply-chain": 0,
"network": 0,
"hygiene": 0
},
"vector": [
{
"kind": "client",
"term": "capability-exposure",
"level": "moderate",
"label": "capability blast radius (moderate) — client exposure if the model is manipulated",
"appliedPenalty": 3
},
{
"kind": "client",
"term": "verification-discount",
"level": "source",
"label": "publisher verification (provenance) — cryptographic build provenance ties the artifact to its source",
"appliedPenalty": 0
},
{
"kind": "client",
"term": "coverage-honesty",
"level": "source",
"label": "inspection depth (source) — how much of the target the scan could see",
"appliedPenalty": 0
}
],
"gatesFired": [],
"methodologyVersion": "mcptrustchecker-1.13"
},
"capability": {
"level": "moderate",
"reasons": [
"ingests untrusted external content (a prompt-injection entry point)",
"can send data / act on an external service"
],
"tags": [
"untrusted-input",
"external-sink"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (150 recovered), not enumerated from a running server. Tool-poisoning, Unicode-smuggling, capability and toxic-flow analysis ran on this inferred surface, but a mis-parsed registration could be missed or mis-attributed, so tool-derived findings are capped below “confirmed”. To grade the real runtime surface, scan the running server: --command \"npx -y <package>\"."
]
},
"findings": [
{
"ruleId": "MTC-FLOW-005",
"title": "Untrusted input can drive an external action",
"category": "exfiltration",
"severity": "medium",
"confidence": "strong",
"description": "Untrusted-input tools ([shipmail_get_domain, shipmail_get_mailbox, shipmail_create_mailbox_export, shipmail_get_mailbox_export, shipmail_get_mailbox_import, shipmail_get_mailbox_rule, shipmail_get_mailbox_inbox_thread, shipmail_get_mailbox_inbox_message, shipmail_read_mailbox_inbox_attachment, shipmail_get_message, shipmail_list_threads, shipmail_get_thread, shipmail_get_member, shipmail_get_webhook, shipmail_get_webhook_delivery, shipmail_get_newsletter, shipmail_get_audience, shipmail_get_audience_feed, shipmail_get_subscriber, shipmail_get_calendar_event, shipmail_get_automation, shipmail_get_booking_page]) co-exist with external-action tools ([shipmail_create_inbox_reply_draft, shipmail_prepare_staged_attachment_upload, shipmail_send_message, shipmail_list_webhooks, shipmail_get_webhook, shipmail_create_webhook, shipmail_update_webhook, shipmail_delete_webhook, shipmail_rotate_webhook_secret, shipmail_test_webhook, shipmail_list_webhook_deliveries, shipmail_get_webhook_delivery, shipmail_replay_webhook_delivery]). A prompt injection could cause unwanted external actions, though no direct sensitive-data leak path was found.",
"remediation": "Require confirmation for state-changing/egress actions triggered after processing untrusted content.",
"location": {
"kind": "flow",
"name": "shipmail_get_domain → shipmail_create_inbox_reply_draft"
},
"evidence": "untrusted [shipmail_get_domain, shipmail_get_mailbox, shipmail_create_mailbox_export, shipmail_get_mailbox_export, shipmail_get_mailbox_import, shipmail_get_mai",
"owasp": "LLM06:2025 Excessive Agency",
"references": [],
"data": {
"untrusted": [
"shipmail_get_domain",
"shipmail_get_mailbox",
"shipmail_create_mailbox_export",
"shipmail_get_mailbox_export",
"shipmail_get_mailbox_import",
"shipmail_get_mailbox_rule",
"shipmail_get_mailbox_inbox_thread",
"shipmail_get_mailbox_inbox_message",
"shipmail_read_mailbox_inbox_attachment",
"shipmail_get_message",
"shipmail_list_threads",
"shipmail_get_thread",
"shipmail_get_member",
"shipmail_get_webhook",
"shipmail_get_webhook_delivery",
"shipmail_get_newsletter",
"shipmail_get_audience",
"shipmail_get_audience_feed",
"shipmail_get_subscriber",
"shipmail_get_calendar_event",
"shipmail_get_automation",
"shipmail_get_booking_page"
],
"sinks": [
"shipmail_create_inbox_reply_draft",
"shipmail_prepare_staged_attachment_upload",
"shipmail_send_message",
"shipmail_list_webhooks",
"shipmail_get_webhook",
"shipmail_create_webhook",
"shipmail_update_webhook",
"shipmail_delete_webhook",
"shipmail_rotate_webhook_secret",
"shipmail_test_webhook",
"shipmail_list_webhook_deliveries",
"shipmail_get_webhook_delivery",
"shipmail_replay_webhook_delivery"
]
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "medium",
"confidence": "strong",
"untrustedInput": [
"shipmail_get_domain",
"shipmail_get_mailbox",
"shipmail_create_mailbox_export",
"shipmail_get_mailbox_export",
"shipmail_get_mailbox_import",
"shipmail_get_mailbox_rule",
"shipmail_get_mailbox_inbox_thread",
"shipmail_get_mailbox_inbox_message",
"shipmail_read_mailbox_inbox_attachment",
"shipmail_get_message",
"shipmail_list_threads",
"shipmail_get_thread",
"shipmail_get_member",
"shipmail_get_webhook",
"shipmail_get_webhook_delivery",
"shipmail_get_newsletter",
"shipmail_get_audience",
"shipmail_get_audience_feed",
"shipmail_get_subscriber",
"shipmail_get_calendar_event",
"shipmail_get_automation",
"shipmail_get_booking_page"
],
"sensitiveSource": [],
"externalSink": [
"shipmail_create_inbox_reply_draft",
"shipmail_prepare_staged_attachment_upload",
"shipmail_send_message",
"shipmail_list_webhooks",
"shipmail_get_webhook",
"shipmail_create_webhook",
"shipmail_update_webhook",
"shipmail_delete_webhook",
"shipmail_rotate_webhook_secret",
"shipmail_test_webhook",
"shipmail_list_webhook_deliveries",
"shipmail_get_webhook_delivery",
"shipmail_replay_webhook_delivery"
],
"selfContained": false,
"description": "Untrusted input can drive an external action even though no sensitive source is exposed."
}
],
"capabilities": [
{
"tool": "shipmail_status",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_domains",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_domain",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_get_domain_dns_records",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_create_domain",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_domain",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_delete_domain",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_verify_domain",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_search_domains",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_mailboxes",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_mailbox",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_list_mailbox_app_passwords",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_create_mailbox_app_password",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_revoke_mailbox_app_password",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_suspend_mailbox",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_resume_mailbox",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_create_mailbox",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_create_mailbox_export",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"download\""
]
}
},
{
"tool": "shipmail_get_mailbox_export",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"download\""
]
}
},
{
"tool": "shipmail_create_mailbox_import",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_mailbox_imports",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_mailbox_import",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_cancel_mailbox_import",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_resume_mailbox_import",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_restore_mailbox_import",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_undo_mailbox_import",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_mailbox",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_delete_mailbox",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_mailbox_folders",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_mailbox_rules",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_mailbox_rule",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_create_mailbox_rule",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_mailbox_rule",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_delete_mailbox_rule",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_create_mailbox_folder",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_mailbox_folder",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_delete_mailbox_folder",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_mailbox_identities",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_mailbox_inbox_messages",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_mailbox_inbox_thread",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_get_mailbox_inbox_message",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_read_mailbox_inbox_attachment",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_list_mailbox_inbox_threads",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_inbox_thread_attention",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_create_inbox_reply_draft",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"send_email\""
]
}
},
{
"tool": "shipmail_send_inbox_reply_draft",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_reply_to_inbox_message",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_reply_to_inbox_thread",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_inbox_message",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_move_inbox_message",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_delete_inbox_message",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_mailbox_forwarding",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_create_mailbox_forwarding",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_delete_mailbox_forwarding",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_reset_mailbox_password",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_set_auto_reply",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_mailbox_delivery_routing",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_mailbox_delivery_routing",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_set_spam_filter",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_inject_sandbox_inbound",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_create_reply_scan",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_reply_scan",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_reply_scan_results",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_messages",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_message_analytics",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_message",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_compose_message_with_file",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_prepare_staged_attachment_upload",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"send_message\""
]
}
},
{
"tool": "shipmail_send_message",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"send_message\""
]
}
},
{
"tool": "shipmail_list_scheduled_messages",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_scheduled_message",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_scheduled_message",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_cancel_scheduled_message",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_reply_to_message",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_threads",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_get_thread",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_reply_to_thread",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_members",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_member",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_list_webhooks",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "shipmail_get_webhook",
"tags": [
"untrusted-input",
"external-sink"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
],
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "shipmail_create_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "shipmail_update_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "shipmail_delete_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "shipmail_rotate_webhook_secret",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "shipmail_test_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "shipmail_list_webhook_deliveries",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "shipmail_get_webhook_delivery",
"tags": [
"untrusted-input",
"external-sink"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
],
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "shipmail_replay_webhook_delivery",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "shipmail_list_suppressions",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_remove_suppression",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_newsletters",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_newsletter_domains",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_newsletter_sender_identities",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_newsletter_assets",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_register_newsletter_asset",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_upload_newsletter_asset_with_file",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_prepare_newsletter_asset_upload",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_newsletter",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_preview_newsletter",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_create_newsletter",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_create_newsletter_from_changelog",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_newsletter",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_run_newsletter_preflight",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_send_newsletter_test",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_schedule_newsletter",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_cancel_newsletter",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_resume_newsletter",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_audiences",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_audience",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_create_audience",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_audience",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_delete_audience",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_audience_feed",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_update_audience_feed",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_rotate_audience_feed",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_revoke_audience_feed",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_subscribers",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_subscriber",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_get_subscriber_by_email",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_add_subscriber",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_add_subscribers_batch",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_subscriber",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_unsubscribe_subscriber",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_resubscribe_subscriber",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_remove_subscriber",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_calendar_events",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_calendar_event",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_create_calendar_event",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_calendar_event",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_delete_calendar_event",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_calendar_availability",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_automations",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_automation",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_create_automation",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_automation",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_run_automation",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_booking_pages",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_booking_page",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "shipmail_create_booking_page",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_booking_page",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_delete_booking_page",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_partner_organizations",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_create_partner_organization",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_partner_organization",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_update_partner_organization",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_resend_partner_ownership_invitation",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_consume_partner_mailbox_credential_grant",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_list_partner_mailbox_credential_grants",
"tags": [],
"reasons": {}
},
{
"tool": "shipmail_get_partner_usage",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "dc20f6bf9740f923e1da03d49fecade04fbc6a28a2a7410c75e1b08fea8e4202",
"stats": {
"tools": 150,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 0,
"medium": 1,
"low": 0,
"info": 0
}
}
}