Tentyl — the complete, unedited output of the deterministic mcptrustchecker engine v1.7.0, scanned . Every finding, capability tag and score component below is exactly what the engine produced — no AI, no post-processing.
{
"tool": {
"name": "mcptrustchecker",
"version": "1.7.0",
"methodologyVersion": "mcptrustchecker-1.7"
},
"target": {
"id": "tentyl-mcp",
"source": {
"kind": "package",
"origin": "tentyl-mcp"
},
"server": {
"name": "tentyl-mcp"
}
},
"grade": "B",
"score": {
"score": 89,
"threatScore": 97,
"grade": "B",
"band": "B",
"categorySubtotals": {
"injection": 1.2,
"exfiltration": 0,
"permissions": 0,
"supply-chain": 2.1,
"network": 0,
"hygiene": 0
},
"vector": [
{
"kind": "threat",
"ruleId": "MTC-INJ-AUTH-1",
"category": "injection",
"severity": "low",
"confidence": "heuristic",
"rawWeight": 3,
"confidenceMult": 0.4,
"diminishingFactor": 1,
"appliedPenalty": 1.2
},
{
"kind": "threat",
"ruleId": "MTC-SUP-011",
"category": "supply-chain",
"severity": "low",
"confidence": "strong",
"rawWeight": 3,
"confidenceMult": 0.7,
"diminishingFactor": 1,
"appliedPenalty": 2.1
},
{
"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": "none",
"label": "publisher verification (unlocatable) — no provenance and no public repository to inspect",
"appliedPenalty": 5
},
{
"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-1.7"
},
"capability": {
"level": "moderate",
"reasons": [
"ingests untrusted external content (a prompt-injection entry point)",
"can send data / act on an external service"
],
"tags": [
"external-sink",
"untrusted-input"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (24 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 ([tentyl_unread]) co-exist with external-action tools ([tentyl_dm, tentyl_ack_all, tentyl_react, tentyl_bookmark, tentyl_pin, tentyl_leave_channel, tentyl_tag, tentyl_attach_link, tentyl_attachments]). 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"
},
"owasp": "LLM06:2025 Excessive Agency",
"references": [],
"data": {
"untrusted": [
"tentyl_unread"
],
"sinks": [
"tentyl_dm",
"tentyl_ack_all",
"tentyl_react",
"tentyl_bookmark",
"tentyl_pin",
"tentyl_leave_channel",
"tentyl_tag",
"tentyl_attach_link",
"tentyl_attachments"
]
}
},
{
"ruleId": "MTC-INJ-AUTH-1",
"title": "Authority framing in tool metadata",
"category": "injection",
"severity": "low",
"confidence": "heuristic",
"description": "Authority framing in tool metadata detected in the description of tool \"tentyl_links\". Instruction-like content in tool metadata is executed by the model, not the human, and is the primary tool-poisoning vector.",
"remediation": "Tool descriptions should describe behavior, not instruct the assistant. Treat imperative / secrecy / sequencing language in metadata as hostile.",
"location": {
"kind": "tool",
"name": "tentyl_links",
"field": "description"
},
"evidence": "important",
"owasp": "LLM01:2025 Prompt Injection",
"data": {
"kind": "authority"
}
},
{
"ruleId": "MTC-SUP-011",
"title": "Package has no source repository",
"category": "supply-chain",
"severity": "low",
"confidence": "strong",
"description": "\"tentyl-mcp\" 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": "tentyl-mcp"
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "medium",
"confidence": "strong",
"untrustedInput": [
"tentyl_unread"
],
"sensitiveSource": [],
"externalSink": [
"tentyl_dm",
"tentyl_ack_all",
"tentyl_react",
"tentyl_bookmark",
"tentyl_pin",
"tentyl_leave_channel",
"tentyl_tag",
"tentyl_attach_link",
"tentyl_attachments"
],
"selfContained": false,
"description": "Untrusted input can drive an external action even though no sensitive source is exposed."
}
],
"capabilities": [
{
"tool": "tentyl_links",
"tags": [],
"reasons": {}
},
{
"tool": "tentyl_send",
"tags": [],
"reasons": {}
},
{
"tool": "tentyl_dm",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"post\""
]
}
},
{
"tool": "tentyl_messages",
"tags": [],
"reasons": {}
},
{
"tool": "tentyl_unread",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"read_message\""
]
}
},
{
"tool": "tentyl_ack_all",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"post\""
]
}
},
{
"tool": "tentyl_react",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"post\""
]
}
},
{
"tool": "tentyl_edit",
"tags": [],
"reasons": {}
},
{
"tool": "tentyl_delete",
"tags": [],
"reasons": {}
},
{
"tool": "tentyl_bookmark",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"post\""
]
}
},
{
"tool": "tentyl_bookmark_list",
"tags": [],
"reasons": {}
},
{
"tool": "tentyl_bookmark_remove",
"tags": [],
"reasons": {}
},
{
"tool": "tentyl_pin",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"post\""
]
}
},
{
"tool": "tentyl_pin_list",
"tags": [],
"reasons": {}
},
{
"tool": "tentyl_pin_remove",
"tags": [],
"reasons": {}
},
{
"tool": "tentyl_leave_channel",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"post\""
]
}
},
{
"tool": "tentyl_tag",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"post\""
]
}
},
{
"tool": "tentyl_tag_list",
"tags": [],
"reasons": {}
},
{
"tool": "tentyl_tag_remove",
"tags": [],
"reasons": {}
},
{
"tool": "tentyl_attach_link",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"post\""
]
}
},
{
"tool": "tentyl_attachments",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"post\""
]
}
},
{
"tool": "tentyl_search",
"tags": [],
"reasons": {}
},
{
"tool": "tentyl_presence",
"tags": [],
"reasons": {}
},
{
"tool": "tentyl_participants",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "45e7b574392a2b82e1b1a4f591324a133da11134518c7a392fbbdc7e5343cf33",
"stats": {
"tools": 24,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 0,
"medium": 1,
"low": 2,
"info": 0
}
}
}