Frihet — 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": "@frihet/mcp-server",
"source": {
"kind": "package",
"origin": "@frihet/mcp-server"
},
"server": {
"name": "@frihet/mcp-server"
}
},
"grade": "A",
"score": {
"score": 92,
"threatScore": 99,
"grade": "A",
"band": "A",
"categorySubtotals": {
"injection": 0,
"exfiltration": 0,
"permissions": 0,
"supply-chain": 1.2,
"network": 0,
"hygiene": 0
},
"vector": [
{
"kind": "threat",
"ruleId": "MTC-SUP-010",
"category": "supply-chain",
"severity": "low",
"confidence": "heuristic",
"rawWeight": 3,
"confidenceMult": 0.4,
"diminishingFactor": 1,
"appliedPenalty": 1.2
},
{
"kind": "client",
"term": "capability-exposure",
"level": "high",
"label": "capability blast radius (high) — client exposure if the model is manipulated",
"appliedPenalty": 6
},
{
"kind": "client",
"term": "verification-discount",
"level": "repo",
"label": "publisher verification (public source) — no provenance, but the source is public and inspectable",
"appliedPenalty": 1
},
{
"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": "high",
"reasons": [
"ingests untrusted external content (a prompt-injection entry point)",
"can send data / act on an external service",
"reads sensitive or local data",
"has a read → egress path (a data-exfiltration surface)",
"untrusted-input, sensitive-source and egress co-exist across tools (toxic-flow surface)"
],
"tags": [
"untrusted-input",
"external-sink",
"sensitive-source"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (157 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-002",
"title": "Completed toxic-flow trifecta across tools",
"category": "exfiltration",
"severity": "critical",
"confidence": "strong",
"description": "This server (without client built-ins) exposes a complete data-exfiltration chain: get_invoice_einvoice ⇒ create_webhook → delete_webhook. Untrusted input is ingested, private data is read, and it can be sent to an external sink — and at least one leg is a direct schema wire (⇒), where a producer's output drops straight into a free-text parameter of the next tool, so the chain needs little agent cooperation. Static analysis proves the primitive exists, not that a specific run will occur.",
"remediation": "Remove one leg of the trifecta: isolate untrusted-input tools from secret-reading tools and from egress tools, or require human approval between them.",
"location": {
"kind": "flow",
"name": "get_invoice_einvoice → create_webhook → delete_webhook"
},
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"references": [],
"data": {
"untrusted": [
"get_invoice_einvoice"
],
"sources": [
"create_webhook",
"update_webhook"
],
"sinks": [
"create_webhook",
"update_webhook",
"delete_webhook",
"test_webhook"
],
"path": [
"get_invoice_einvoice",
"create_webhook",
"delete_webhook"
],
"edges": [
{
"from": "get_invoice_einvoice",
"to": "create_webhook",
"kind": "schema-wired"
},
{
"from": "create_webhook",
"to": "delete_webhook",
"kind": "agent-mediated"
}
],
"wired": true
}
},
{
"ruleId": "MTC-FLOW-003",
"title": "Read-and-egress in one tool: \"create_webhook\"",
"category": "exfiltration",
"severity": "high",
"confidence": "strong",
"description": "Tool \"create_webhook\" can both read sensitive data and send data to an external destination. Even without an explicit untrusted-input leg, this is a single-call data-exfiltration path if the model is ever manipulated.",
"remediation": "Separate reading from sending; require explicit user confirmation before egress of file/secret contents.",
"location": {
"kind": "flow",
"name": "create_webhook"
},
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"references": [],
"data": {
"tags": [
"external-sink",
"sensitive-source"
]
}
},
{
"ruleId": "MTC-FLOW-003",
"title": "Read-and-egress in one tool: \"update_webhook\"",
"category": "exfiltration",
"severity": "high",
"confidence": "strong",
"description": "Tool \"update_webhook\" can both read sensitive data and send data to an external destination. Even without an explicit untrusted-input leg, this is a single-call data-exfiltration path if the model is ever manipulated.",
"remediation": "Separate reading from sending; require explicit user confirmation before egress of file/secret contents.",
"location": {
"kind": "flow",
"name": "update_webhook"
},
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"references": [],
"data": {
"tags": [
"external-sink",
"sensitive-source"
]
}
},
{
"ruleId": "MTC-CAP-007",
"title": "Unconstrained URL/host parameter \"url\" on \"create_webhook\"",
"category": "network",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"create_webhook\" takes a URL/host parameter \"url\" with no allowlist/pattern. An outbound-request tool with an unbounded destination enables SSRF and cloud-metadata access (e.g. 169.254.169.254).",
"remediation": "Allowlist destinations or constrain the parameter; block private/link-local addresses server-side.",
"location": {
"kind": "tool",
"name": "create_webhook",
"field": "inputSchema.properties.url"
},
"owasp": "LLM06:2025 Excessive Agency",
"data": {
"param": "url"
}
},
{
"ruleId": "MTC-CAP-007",
"title": "Unconstrained URL/host parameter \"url\" on \"update_webhook\"",
"category": "network",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"update_webhook\" takes a URL/host parameter \"url\" with no allowlist/pattern. An outbound-request tool with an unbounded destination enables SSRF and cloud-metadata access (e.g. 169.254.169.254).",
"remediation": "Allowlist destinations or constrain the parameter; block private/link-local addresses server-side.",
"location": {
"kind": "tool",
"name": "update_webhook",
"field": "inputSchema.properties.url"
},
"owasp": "LLM06:2025 Excessive Agency",
"data": {
"param": "url"
}
},
{
"ruleId": "MTC-SUP-010",
"title": "Package runs install-time scripts (postinstall)",
"category": "supply-chain",
"severity": "low",
"confidence": "heuristic",
"description": "\"@frihet/mcp-server\" executes postinstall script(s) at install time. An install hook runs at install time; most are routine build/setup, but review what it does before trusting it.",
"remediation": "Review the scripts; install with --ignore-scripts where possible and vet what they do.",
"location": {
"kind": "package",
"name": "@frihet/mcp-server"
},
"evidence": "node scripts/postinstall.js || true",
"owasp": "LLM03:2025 Supply Chain",
"references": [
"https://github.com/ossf/package-analysis",
"https://owasp.org/www-project-top-10-ci-cd-security-risks/"
],
"data": {
"scripts": [
"postinstall"
]
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "critical",
"confidence": "strong",
"untrustedInput": [
"get_invoice_einvoice"
],
"sensitiveSource": [
"create_webhook",
"update_webhook"
],
"externalSink": [
"create_webhook",
"update_webhook",
"delete_webhook",
"test_webhook"
],
"selfContained": false,
"path": [
"get_invoice_einvoice",
"create_webhook",
"delete_webhook"
],
"pathWired": true,
"description": "A cross-tool exfiltration chain exists: get_invoice_einvoice ⇒ create_webhook → delete_webhook."
},
{
"id": "flow-2",
"severity": "high",
"confidence": "strong",
"untrustedInput": [],
"sensitiveSource": [
"create_webhook"
],
"externalSink": [
"create_webhook"
],
"selfContained": true,
"description": "Tool \"create_webhook\" both reads sensitive data and can send it externally."
},
{
"id": "flow-3",
"severity": "high",
"confidence": "strong",
"untrustedInput": [],
"sensitiveSource": [
"update_webhook"
],
"externalSink": [
"update_webhook"
],
"selfContained": true,
"description": "Tool \"update_webhook\" both reads sensitive data and can send it externally."
}
],
"capabilities": [
{
"tool": "period_close_status",
"tags": [],
"reasons": {}
},
{
"tool": "period_close",
"tags": [],
"reasons": {}
},
{
"tool": "period_reopen",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_gl_entry_approve",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_gl_entry_reject",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_gl_entry_audit_log",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_bank_rules_list",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_bank_rule_create",
"tags": [],
"reasons": {}
},
{
"tool": "list_bank_accounts",
"tags": [],
"reasons": {}
},
{
"tool": "get_bank_account",
"tags": [],
"reasons": {}
},
{
"tool": "list_transactions",
"tags": [],
"reasons": {}
},
{
"tool": "categorize_transaction",
"tags": [],
"reasons": {}
},
{
"tool": "match_transaction_to_invoice",
"tags": [],
"reasons": {}
},
{
"tool": "list_clients",
"tags": [],
"reasons": {}
},
{
"tool": "get_client",
"tags": [],
"reasons": {}
},
{
"tool": "create_client",
"tags": [],
"reasons": {}
},
{
"tool": "update_client",
"tags": [],
"reasons": {}
},
{
"tool": "delete_client",
"tags": [],
"reasons": {}
},
{
"tool": "list_client_contacts",
"tags": [],
"reasons": {}
},
{
"tool": "create_client_contact",
"tags": [],
"reasons": {}
},
{
"tool": "delete_client_contact",
"tags": [],
"reasons": {}
},
{
"tool": "list_client_activities",
"tags": [],
"reasons": {}
},
{
"tool": "log_client_activity",
"tags": [],
"reasons": {}
},
{
"tool": "list_client_notes",
"tags": [],
"reasons": {}
},
{
"tool": "create_client_note",
"tags": [],
"reasons": {}
},
{
"tool": "delete_client_note",
"tags": [],
"reasons": {}
},
{
"tool": "list_deposits",
"tags": [],
"reasons": {}
},
{
"tool": "get_deposit",
"tags": [],
"reasons": {}
},
{
"tool": "create_deposit",
"tags": [],
"reasons": {}
},
{
"tool": "update_deposit",
"tags": [],
"reasons": {}
},
{
"tool": "delete_deposit",
"tags": [],
"reasons": {}
},
{
"tool": "apply_deposit",
"tags": [],
"reasons": {}
},
{
"tool": "refund_deposit",
"tags": [],
"reasons": {}
},
{
"tool": "send_einvoice",
"tags": [],
"reasons": {}
},
{
"tool": "get_einvoice_status",
"tags": [],
"reasons": {}
},
{
"tool": "validate_einvoice_xml",
"tags": [],
"reasons": {}
},
{
"tool": "export_datev",
"tags": [],
"reasons": {}
},
{
"tool": "einvoice_export",
"tags": [],
"reasons": {}
},
{
"tool": "face_submit",
"tags": [],
"reasons": {}
},
{
"tool": "face_status",
"tags": [],
"reasons": {}
},
{
"tool": "ticketbai_submit",
"tags": [],
"reasons": {}
},
{
"tool": "ticketbai_status",
"tags": [],
"reasons": {}
},
{
"tool": "ksef_submit",
"tags": [],
"reasons": {}
},
{
"tool": "list_expenses",
"tags": [],
"reasons": {}
},
{
"tool": "get_expense",
"tags": [],
"reasons": {}
},
{
"tool": "create_expense",
"tags": [],
"reasons": {}
},
{
"tool": "update_expense",
"tags": [],
"reasons": {}
},
{
"tool": "delete_expense",
"tags": [],
"reasons": {}
},
{
"tool": "get_modelo_303_summary",
"tags": [],
"reasons": {}
},
{
"tool": "get_modelo_130_summary",
"tags": [],
"reasons": {}
},
{
"tool": "get_modelo_390_summary",
"tags": [],
"reasons": {}
},
{
"tool": "get_modelo_180_summary",
"tags": [],
"reasons": {}
},
{
"tool": "get_modelo_347_summary",
"tags": [],
"reasons": {}
},
{
"tool": "verifactu_status",
"tags": [],
"reasons": {}
},
{
"tool": "verifactu_resubmit",
"tags": [],
"reasons": {}
},
{
"tool": "gestoria_message_send",
"tags": [],
"reasons": {}
},
{
"tool": "gestoria_messages_list",
"tags": [],
"reasons": {}
},
{
"tool": "gestoria_template_create",
"tags": [],
"reasons": {}
},
{
"tool": "gestoria_template_bulk_send",
"tags": [],
"reasons": {}
},
{
"tool": "gestoria_aging_consolidated",
"tags": [],
"reasons": {}
},
{
"tool": "leave_request_create",
"tags": [],
"reasons": {}
},
{
"tool": "leave_approve",
"tags": [],
"reasons": {}
},
{
"tool": "leave_reject",
"tags": [],
"reasons": {}
},
{
"tool": "leave_cancel",
"tags": [],
"reasons": {}
},
{
"tool": "leave_list",
"tags": [],
"reasons": {}
},
{
"tool": "attendance_clock_in",
"tags": [],
"reasons": {}
},
{
"tool": "attendance_clock_out",
"tags": [],
"reasons": {}
},
{
"tool": "overtime_report",
"tags": [],
"reasons": {}
},
{
"tool": "anomaly_list",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_modelo_415_summary",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_modelo_425_summary",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_modelo_418_summary",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_aiem_calculate",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_modelo_200_summary",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_modelo_202_summary",
"tags": [],
"reasons": {}
},
{
"tool": "get_business_context",
"tags": [],
"reasons": {}
},
{
"tool": "get_monthly_summary",
"tags": [],
"reasons": {}
},
{
"tool": "get_quarterly_taxes",
"tags": [],
"reasons": {}
},
{
"tool": "duplicate_invoice",
"tags": [],
"reasons": {}
},
{
"tool": "list_invoices",
"tags": [],
"reasons": {}
},
{
"tool": "get_invoice",
"tags": [],
"reasons": {}
},
{
"tool": "create_invoice",
"tags": [],
"reasons": {}
},
{
"tool": "update_invoice",
"tags": [],
"reasons": {}
},
{
"tool": "delete_invoice",
"tags": [],
"reasons": {}
},
{
"tool": "search_invoices",
"tags": [],
"reasons": {}
},
{
"tool": "send_invoice",
"tags": [],
"reasons": {}
},
{
"tool": "mark_invoice_paid",
"tags": [],
"reasons": {}
},
{
"tool": "get_invoice_pdf",
"tags": [],
"reasons": {}
},
{
"tool": "get_invoice_einvoice",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"download\""
]
}
},
{
"tool": "create_credit_note",
"tags": [],
"reasons": {}
},
{
"tool": "apply_late_fee",
"tags": [],
"reasons": {}
},
{
"tool": "list_kitchen_tickets",
"tags": [],
"reasons": {}
},
{
"tool": "get_kitchen_ticket",
"tags": [],
"reasons": {}
},
{
"tool": "update_kitchen_ticket",
"tags": [],
"reasons": {}
},
{
"tool": "list_kitchen_stations",
"tags": [],
"reasons": {}
},
{
"tool": "list_menu_items",
"tags": [],
"reasons": {}
},
{
"tool": "kitchen_flow_summary",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_portal_onboard_link_generate",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_tax_id_vies_lookup",
"tags": [],
"reasons": {}
},
{
"tool": "onboarding_status",
"tags": [],
"reasons": {}
},
{
"tool": "onboarding_persona_set",
"tags": [],
"reasons": {}
},
{
"tool": "payroll_export",
"tags": [],
"reasons": {}
},
{
"tool": "payroll_checklist",
"tags": [],
"reasons": {}
},
{
"tool": "permissions_matrix",
"tags": [],
"reasons": {}
},
{
"tool": "permissions_me",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_portal_domain_add",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_portal_domain_verify",
"tags": [],
"reasons": {}
},
{
"tool": "frihet_portal_domain_remove",
"tags": [],
"reasons": {}
},
{
"tool": "list_terminals",
"tags": [],
"reasons": {}
},
{
"tool": "get_sale",
"tags": [],
"reasons": {}
},
{
"tool": "list_sales",
"tags": [],
"reasons": {}
},
{
"tool": "refund_sale",
"tags": [],
"reasons": {}
},
{
"tool": "list_products",
"tags": [],
"reasons": {}
},
{
"tool": "get_product",
"tags": [],
"reasons": {}
},
{
"tool": "create_product",
"tags": [],
"reasons": {}
},
{
"tool": "update_product",
"tags": [],
"reasons": {}
},
{
"tool": "delete_product",
"tags": [],
"reasons": {}
},
{
"tool": "list_quotes",
"tags": [],
"reasons": {}
},
{
"tool": "get_quote",
"tags": [],
"reasons": {}
},
{
"tool": "create_quote",
"tags": [],
"reasons": {}
},
{
"tool": "update_quote",
"tags": [],
"reasons": {}
},
{
"tool": "delete_quote",
"tags": [],
"reasons": {}
},
{
"tool": "send_quote",
"tags": [],
"reasons": {}
},
{
"tool": "list_recurring_invoices",
"tags": [],
"reasons": {}
},
{
"tool": "get_recurring_invoice",
"tags": [],
"reasons": {}
},
{
"tool": "create_recurring_invoice",
"tags": [],
"reasons": {}
},
{
"tool": "update_recurring_invoice",
"tags": [],
"reasons": {}
},
{
"tool": "pause_recurring_invoice",
"tags": [],
"reasons": {}
},
{
"tool": "resume_recurring_invoice",
"tags": [],
"reasons": {}
},
{
"tool": "delete_recurring_invoice",
"tags": [],
"reasons": {}
},
{
"tool": "run_recurring_now",
"tags": [],
"reasons": {}
},
{
"tool": "list_reservations",
"tags": [],
"reasons": {}
},
{
"tool": "get_reservation",
"tags": [],
"reasons": {}
},
{
"tool": "create_reservation",
"tags": [],
"reasons": {}
},
{
"tool": "list_properties",
"tags": [],
"reasons": {}
},
{
"tool": "sync_channel",
"tags": [],
"reasons": {}
},
{
"tool": "list_team_members",
"tags": [],
"reasons": {}
},
{
"tool": "invite_team_member",
"tags": [],
"reasons": {}
},
{
"tool": "update_team_member_role",
"tags": [],
"reasons": {}
},
{
"tool": "remove_team_member",
"tags": [],
"reasons": {}
},
{
"tool": "list_time_entries",
"tags": [],
"reasons": {}
},
{
"tool": "get_time_entry",
"tags": [],
"reasons": {}
},
{
"tool": "create_time_entry",
"tags": [],
"reasons": {}
},
{
"tool": "update_time_entry",
"tags": [],
"reasons": {}
},
{
"tool": "delete_time_entry",
"tags": [],
"reasons": {}
},
{
"tool": "get_time_summary",
"tags": [],
"reasons": {}
},
{
"tool": "list_vendors",
"tags": [],
"reasons": {}
},
{
"tool": "get_vendor",
"tags": [],
"reasons": {}
},
{
"tool": "create_vendor",
"tags": [],
"reasons": {}
},
{
"tool": "update_vendor",
"tags": [],
"reasons": {}
},
{
"tool": "delete_vendor",
"tags": [],
"reasons": {}
},
{
"tool": "list_webhooks",
"tags": [],
"reasons": {}
},
{
"tool": "get_webhook",
"tags": [],
"reasons": {}
},
{
"tool": "create_webhook",
"tags": [
"external-sink",
"sensitive-source"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
],
"sensitive-source": [
"parameter \"secret\""
]
}
},
{
"tool": "update_webhook",
"tags": [
"external-sink",
"sensitive-source"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
],
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}