Signdocs Brasil — 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": "@signdocs-brasil/mcp-server",
"source": {
"kind": "package",
"origin": "@signdocs-brasil/mcp-server"
},
"server": {
"name": "@signdocs-brasil/mcp-server"
}
},
"grade": "A",
"score": {
"score": 92,
"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": "high",
"label": "capability blast radius (high) — client exposure if the model is manipulated",
"appliedPenalty": 6
},
{
"kind": "client",
"term": "verification-discount",
"level": "none",
"label": "publisher verification (unlinked) — no provenance/repo link, but the shipped source was fully read",
"appliedPenalty": 2
},
{
"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": [
"sensitive-source",
"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 (26 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: download_document → get_envelope → delete_webhook. Untrusted input is ingested, private data is read, and it can be sent to an external sink via the agent composing the tools (→). 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": "download_document → get_envelope → delete_webhook"
},
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"references": [],
"data": {
"untrusted": [
"download_document",
"get_envelope_combined_stamp"
],
"sources": [
"get_envelope",
"get_envelope_combined_stamp"
],
"sinks": [
"register_webhook",
"delete_webhook",
"test_webhook"
],
"path": [
"download_document",
"get_envelope",
"delete_webhook"
],
"edges": [
{
"from": "download_document",
"to": "get_envelope",
"kind": "agent-mediated"
},
{
"from": "get_envelope",
"to": "delete_webhook",
"kind": "agent-mediated"
}
],
"wired": false
}
},
{
"ruleId": "MTC-SUP-011",
"title": "Package declares no source repository",
"category": "supply-chain",
"severity": "info",
"confidence": "strong",
"description": "\"@signdocs-brasil/mcp-server\" declares no repository URL, so its published artifact cannot be compared against reviewable source.",
"remediation": "Prefer packages that link to public, reviewable source.",
"location": {
"kind": "package",
"name": "@signdocs-brasil/mcp-server"
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "critical",
"confidence": "strong",
"untrustedInput": [
"download_document",
"get_envelope_combined_stamp"
],
"sensitiveSource": [
"get_envelope",
"get_envelope_combined_stamp"
],
"externalSink": [
"register_webhook",
"delete_webhook",
"test_webhook"
],
"selfContained": false,
"path": [
"download_document",
"get_envelope",
"delete_webhook"
],
"pathWired": false,
"description": "A cross-tool exfiltration chain exists: download_document → get_envelope → delete_webhook."
}
],
"capabilities": [
{
"tool": "get_my_account",
"tags": [],
"reasons": {}
},
{
"tool": "create_signing_session",
"tags": [],
"reasons": {}
},
{
"tool": "create_envelope",
"tags": [],
"reasons": {}
},
{
"tool": "get_signing_session_status",
"tags": [],
"reasons": {}
},
{
"tool": "get_envelope",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"get_env\""
]
}
},
{
"tool": "cancel_signing_session",
"tags": [],
"reasons": {}
},
{
"tool": "cancel_envelope",
"tags": [],
"reasons": {}
},
{
"tool": "download_document",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"download\""
]
}
},
{
"tool": "get_evidence",
"tags": [],
"reasons": {}
},
{
"tool": "verify_evidence",
"tags": [],
"reasons": {}
},
{
"tool": "verify_envelope",
"tags": [],
"reasons": {}
},
{
"tool": "verify_document",
"tags": [],
"reasons": {}
},
{
"tool": "upload_document",
"tags": [],
"reasons": {}
},
{
"tool": "add_session_to_envelope",
"tags": [],
"reasons": {}
},
{
"tool": "get_envelope_combined_stamp",
"tags": [
"untrusted-input",
"sensitive-source"
],
"reasons": {
"untrusted-input": [
"keyword \"download\""
],
"sensitive-source": [
"keyword \"get_env\""
]
}
},
{
"tool": "get_signing_session",
"tags": [],
"reasons": {}
},
{
"tool": "list_signing_sessions",
"tags": [],
"reasons": {}
},
{
"tool": "resend_signing_session_otp",
"tags": [],
"reasons": {}
},
{
"tool": "list_transactions",
"tags": [],
"reasons": {}
},
{
"tool": "get_transaction",
"tags": [],
"reasons": {}
},
{
"tool": "cancel_transaction",
"tags": [],
"reasons": {}
},
{
"tool": "request_document_upload",
"tags": [],
"reasons": {}
},
{
"tool": "register_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "list_webhooks",
"tags": [],
"reasons": {}
},
{
"tool": "delete_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "test_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
}
],
"surfaceDigest": "c18e8e092ac024178f6a7b8446c5a919cbb229b13d38eaf6501bcc0dbd28a910",
"stats": {
"tools": 26,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 1,
"high": 0,
"medium": 0,
"low": 0,
"info": 1
}
}
}