Spotify — 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": "@darrenjaws/spotify-mcp",
"source": {
"kind": "package",
"origin": "@darrenjaws/spotify-mcp"
},
"server": {
"name": "@darrenjaws/spotify-mcp"
}
},
"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": [
"can execute shell commands or code"
],
"tags": [
"code-exec"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (32 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 (build/spotify/auth.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`build/spotify/auth.js:253`): 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": "build/spotify/auth.js"
},
"evidence": "import(\"child_process\").then(({ spawn }) => { const platform = process.platform;",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "build/spotify/auth.js",
"line": 253,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (build/tools/playback.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`build/tools/playback.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": "build/tools/playback.js"
},
"evidence": "ort { spawnSync } from \"child_process\"; import { getAuthenticatedClient } from \"../spotify/client.js\"; import { handleTo",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "build/tools/playback.js",
"line": 4,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (build/tools/system.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`build/tools/system.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": "build/tools/system.js"
},
"evidence": "import { spawn } from \"child_process\"; import { logger } from \"../utils/logger.js\"; import { getAuthenticatedClient } f",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "build/tools/system.js",
"line": 4,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in packaging/dev tooling (build/setup.js)",
"category": "permissions",
"severity": "low",
"confidence": "heuristic",
"description": "In a packaging/dev/install script (shipped, but not the server runtime) (`build/setup.js:8`): 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": "build/setup.js"
},
"evidence": "import { spawn } from \"child_process\"; import { writeFile } from \"fs/promises\"; import { homedir } from \"os\"; import {",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "build/setup.js",
"line": 8,
"nonRuntime": true
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "spotify_play",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_pause",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_next",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_previous",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_set_volume",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_get_playback_state",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_get_devices",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_shuffle",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_repeat",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_search",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_get_playlists",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_get_playlist",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_create_playlist",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_add_to_playlist",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_remove_from_playlist",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_reorder_playlist_tracks",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_delete_playlist",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_update_playlist",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_get_user_profile",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_get_top_items",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_get_recently_played",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_get_saved_tracks",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_get_saved_albums",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_get_followed_artists",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_save_tracks",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_remove_saved_tracks",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_save_albums",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_remove_saved_albums",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_follow_artists",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_unfollow_artists",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_transfer_playback",
"tags": [],
"reasons": {}
},
{
"tool": "spotify_open",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "f5f36f9acb509f433df22afd3068dd2f368cfd02b8c5dc6836a4cd85a1769715",
"stats": {
"tools": 32,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 3,
"medium": 0,
"low": 1,
"info": 0
}
}
}