Sdk — the complete, unedited output of the deterministic mcptrustchecker engine v1.8.0, scanned . Every finding, capability tag and score component below is exactly what the engine produced — no AI, no post-processing.
{
"tool": {
"name": "mcptrustchecker",
"version": "1.8.0",
"methodologyVersion": "mcptrustchecker-1.8"
},
"target": {
"id": "@nuntly/sdk-mcp",
"source": {
"kind": "package",
"origin": "@nuntly/sdk-mcp"
},
"server": {
"name": "@nuntly/sdk-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-1.8"
},
"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 (56 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 ([retrieve-email-content, retrieve-message-attachment, retrieve-message-content, list-thread-messages]) co-exist with external-action tools ([send-email, forward-message, create-webhook, delete-webhook, retrieve-webhook, update-webhook, replay-webhook-event]). 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": "retrieve-email-content → send-email"
},
"evidence": "untrusted [retrieve-email-content, retrieve-message-attachment, retrieve-message-content, list-thread-messages] → sinks [send-email, forward-message, create-web",
"owasp": "LLM06:2025 Excessive Agency",
"references": [],
"data": {
"untrusted": [
"retrieve-email-content",
"retrieve-message-attachment",
"retrieve-message-content",
"list-thread-messages"
],
"sinks": [
"send-email",
"forward-message",
"create-webhook",
"delete-webhook",
"retrieve-webhook",
"update-webhook",
"replay-webhook-event"
]
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "medium",
"confidence": "strong",
"untrustedInput": [
"retrieve-email-content",
"retrieve-message-attachment",
"retrieve-message-content",
"list-thread-messages"
],
"sensitiveSource": [],
"externalSink": [
"send-email",
"forward-message",
"create-webhook",
"delete-webhook",
"retrieve-webhook",
"update-webhook",
"replay-webhook-event"
],
"selfContained": false,
"description": "Untrusted input can drive an external action even though no sensitive source is exposed."
}
],
"capabilities": [
{
"tool": "retrieve-agent-memory",
"tags": [],
"reasons": {}
},
{
"tool": "upsert-agent-memory",
"tags": [],
"reasons": {}
},
{
"tool": "create-api-key",
"tags": [],
"reasons": {}
},
{
"tool": "delete-api-key",
"tags": [],
"reasons": {}
},
{
"tool": "list-api-keys",
"tags": [],
"reasons": {}
},
{
"tool": "retrieve-api-key",
"tags": [],
"reasons": {}
},
{
"tool": "update-api-key",
"tags": [],
"reasons": {}
},
{
"tool": "create-domain",
"tags": [],
"reasons": {}
},
{
"tool": "delete-domain",
"tags": [],
"reasons": {}
},
{
"tool": "list-domains",
"tags": [],
"reasons": {}
},
{
"tool": "retrieve-domain",
"tags": [],
"reasons": {}
},
{
"tool": "update-domain",
"tags": [],
"reasons": {}
},
{
"tool": "cancel-email",
"tags": [],
"reasons": {}
},
{
"tool": "list-emails",
"tags": [],
"reasons": {}
},
{
"tool": "retrieve-bulk-emails",
"tags": [],
"reasons": {}
},
{
"tool": "retrieve-email",
"tags": [],
"reasons": {}
},
{
"tool": "retrieve-email-content",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"download\""
]
}
},
{
"tool": "retrieve-email-events",
"tags": [],
"reasons": {}
},
{
"tool": "retrieve-email-stats",
"tags": [],
"reasons": {}
},
{
"tool": "send-bulk-emails",
"tags": [],
"reasons": {}
},
{
"tool": "send-email",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"send_email\""
]
}
},
{
"tool": "create-inbox",
"tags": [],
"reasons": {}
},
{
"tool": "delete-inbox",
"tags": [],
"reasons": {}
},
{
"tool": "list-inboxes",
"tags": [],
"reasons": {}
},
{
"tool": "retrieve-inbox",
"tags": [],
"reasons": {}
},
{
"tool": "send-inbox-message",
"tags": [],
"reasons": {}
},
{
"tool": "update-inbox",
"tags": [],
"reasons": {}
},
{
"tool": "forward-message",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"forward_message\""
]
}
},
{
"tool": "list-message-attachments",
"tags": [],
"reasons": {}
},
{
"tool": "list-messages",
"tags": [],
"reasons": {}
},
{
"tool": "reply-to-message",
"tags": [],
"reasons": {}
},
{
"tool": "retrieve-message",
"tags": [],
"reasons": {}
},
{
"tool": "retrieve-message-attachment",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"download\""
]
}
},
{
"tool": "retrieve-message-content",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"download\""
]
}
},
{
"tool": "update-message",
"tags": [],
"reasons": {}
},
{
"tool": "create-namespace",
"tags": [],
"reasons": {}
},
{
"tool": "delete-namespace",
"tags": [],
"reasons": {}
},
{
"tool": "list-namespace-inboxes",
"tags": [],
"reasons": {}
},
{
"tool": "list-namespaces",
"tags": [],
"reasons": {}
},
{
"tool": "retrieve-namespace",
"tags": [],
"reasons": {}
},
{
"tool": "update-namespace",
"tags": [],
"reasons": {}
},
{
"tool": "list-organizations",
"tags": [],
"reasons": {}
},
{
"tool": "retrieve-organization",
"tags": [],
"reasons": {}
},
{
"tool": "retrieve-organization-usage",
"tags": [],
"reasons": {}
},
{
"tool": "list-inbox-threads",
"tags": [],
"reasons": {}
},
{
"tool": "list-thread-messages",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"read_message\""
]
}
},
{
"tool": "retrieve-thread",
"tags": [],
"reasons": {}
},
{
"tool": "update-thread",
"tags": [],
"reasons": {}
},
{
"tool": "create-webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "delete-webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "list-webhooks",
"tags": [],
"reasons": {}
},
{
"tool": "retrieve-webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "update-webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "list-webhook-event-deliveries",
"tags": [],
"reasons": {}
},
{
"tool": "list-webhooks-events",
"tags": [],
"reasons": {}
},
{
"tool": "replay-webhook-event",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
}
],
"surfaceDigest": "2dd7d415830e899006e20f10e5d8d58c803c02aacb106671f1917a87c8fccb66",
"stats": {
"tools": 56,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 0,
"medium": 1,
"low": 0,
"info": 0
}
}
}