YouTube — 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": "@kud/mcp-youtube",
"source": {
"kind": "package",
"origin": "@kud/mcp-youtube"
},
"server": {
"name": "@kud/mcp-youtube"
}
},
"grade": "A",
"score": {
"score": 94,
"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": "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": "high",
"reasons": [
"ingests untrusted external content (a prompt-injection entry point)",
"can send data / act on an external service",
"can execute shell commands or code"
],
"tags": [
"untrusted-input",
"external-sink",
"code-exec"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (52 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-SRC-002",
"title": "Shell/command execution in server code (dist/index.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`dist/index.js:16`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.",
"remediation": "Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.",
"location": {
"kind": "server",
"name": "dist/index.js"
},
"evidence": "nSync } = await import(\"child_process\"); const { dirname, join: pathJoin } = await import(\"path\"); const { fileU",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "dist/index.js",
"line": 16,
"nonRuntime": false
}
},
{
"ruleId": "MTC-FLOW-005",
"title": "Untrusted input can drive an external action",
"category": "exfiltration",
"severity": "medium",
"confidence": "strong",
"description": "Untrusted-input tools ([list-videos, download-caption]) co-exist with external-action tools ([create-comment-thread]). 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": "list-videos → create-comment-thread"
},
"evidence": "untrusted [list-videos, download-caption] → sinks [create-comment-thread]",
"owasp": "LLM06:2025 Excessive Agency",
"references": [],
"data": {
"untrusted": [
"list-videos",
"download-caption"
],
"sinks": [
"create-comment-thread"
]
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in packaging/dev tooling (setup.js)",
"category": "permissions",
"severity": "low",
"confidence": "heuristic",
"description": "In a packaging/dev/install script (shipped, but not the server runtime) (`setup.js:4`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.",
"remediation": "Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.",
"location": {
"kind": "server",
"name": "setup.js"
},
"evidence": "port { execFile } from \"child_process\" import { google } from \"googleapis\" const REDIRECT_PORT = 8391 const REDIRECT_UR",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "setup.js",
"line": 4,
"nonRuntime": true
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "medium",
"confidence": "strong",
"untrustedInput": [
"list-videos",
"download-caption"
],
"sensitiveSource": [],
"externalSink": [
"create-comment-thread"
],
"selfContained": false,
"description": "Untrusted input can drive an external action even though no sensitive source is exposed."
}
],
"capabilities": [
{
"tool": "search",
"tags": [],
"reasons": {}
},
{
"tool": "list-playlists",
"tags": [],
"reasons": {}
},
{
"tool": "get-playlist",
"tags": [],
"reasons": {}
},
{
"tool": "create-playlist",
"tags": [],
"reasons": {}
},
{
"tool": "add-to-playlist",
"tags": [],
"reasons": {}
},
{
"tool": "remove-from-playlist",
"tags": [],
"reasons": {}
},
{
"tool": "clean-playlist",
"tags": [],
"reasons": {}
},
{
"tool": "delete-playlist",
"tags": [],
"reasons": {}
},
{
"tool": "update-playlist",
"tags": [],
"reasons": {}
},
{
"tool": "update-playlist-item",
"tags": [],
"reasons": {}
},
{
"tool": "list-videos",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "update-video",
"tags": [],
"reasons": {}
},
{
"tool": "rate-video",
"tags": [],
"reasons": {}
},
{
"tool": "get-video-rating",
"tags": [],
"reasons": {}
},
{
"tool": "delete-video",
"tags": [],
"reasons": {}
},
{
"tool": "upload-video",
"tags": [],
"reasons": {}
},
{
"tool": "report-video-abuse",
"tags": [],
"reasons": {}
},
{
"tool": "update-channel",
"tags": [],
"reasons": {}
},
{
"tool": "list-channels",
"tags": [],
"reasons": {}
},
{
"tool": "list-channel-sections",
"tags": [],
"reasons": {}
},
{
"tool": "create-channel-section",
"tags": [],
"reasons": {}
},
{
"tool": "update-channel-section",
"tags": [],
"reasons": {}
},
{
"tool": "delete-channel-section",
"tags": [],
"reasons": {}
},
{
"tool": "list-subscriptions",
"tags": [],
"reasons": {}
},
{
"tool": "subscribe",
"tags": [],
"reasons": {}
},
{
"tool": "unsubscribe",
"tags": [],
"reasons": {}
},
{
"tool": "list-comments",
"tags": [],
"reasons": {}
},
{
"tool": "reply-to-comment",
"tags": [],
"reasons": {}
},
{
"tool": "update-comment",
"tags": [],
"reasons": {}
},
{
"tool": "delete-comment",
"tags": [],
"reasons": {}
},
{
"tool": "set-comment-moderation-status",
"tags": [],
"reasons": {}
},
{
"tool": "list-comment-threads",
"tags": [],
"reasons": {}
},
{
"tool": "create-comment-thread",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"create_comment\""
]
}
},
{
"tool": "list-captions",
"tags": [],
"reasons": {}
},
{
"tool": "upload-caption",
"tags": [],
"reasons": {}
},
{
"tool": "update-caption",
"tags": [],
"reasons": {}
},
{
"tool": "download-caption",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"download\""
]
}
},
{
"tool": "delete-caption",
"tags": [],
"reasons": {}
},
{
"tool": "set-thumbnail",
"tags": [],
"reasons": {}
},
{
"tool": "set-watermark",
"tags": [],
"reasons": {}
},
{
"tool": "unset-watermark",
"tags": [],
"reasons": {}
},
{
"tool": "list-activities",
"tags": [],
"reasons": {}
},
{
"tool": "list-playlist-images",
"tags": [],
"reasons": {}
},
{
"tool": "upload-playlist-image",
"tags": [],
"reasons": {}
},
{
"tool": "update-playlist-image",
"tags": [],
"reasons": {}
},
{
"tool": "delete-playlist-image",
"tags": [],
"reasons": {}
},
{
"tool": "list-members",
"tags": [],
"reasons": {}
},
{
"tool": "list-membership-levels",
"tags": [],
"reasons": {}
},
{
"tool": "list-video-categories",
"tags": [],
"reasons": {}
},
{
"tool": "list-i18n-languages",
"tags": [],
"reasons": {}
},
{
"tool": "list-i18n-regions",
"tags": [],
"reasons": {}
},
{
"tool": "list-video-abuse-report-reasons",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "910569b6db84c340554df7bd8cb27b16ca6a71c5c8a8d852234ec39e16e274a0",
"stats": {
"tools": 52,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 1,
"medium": 1,
"low": 1,
"info": 0
}
}
}