Polyscreen — 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": "polyscreen-mcp",
"source": {
"kind": "package",
"origin": "polyscreen-mcp"
},
"server": {
"name": "polyscreen-mcp"
}
},
"grade": "A",
"score": {
"score": 93,
"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": "repo",
"label": "publisher verification (public source) — no provenance, but the source is public and inspectable",
"appliedPenalty": 1
},
{
"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 execute shell commands or code"
],
"tags": [
"untrusted-input",
"code-exec"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (61 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/android/adb-runner.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`dist/android/adb-runner.js:1`): 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/android/adb-runner.js"
},
"evidence": "rt { spawn } from \"node:child_process\"; import { randomUUID } from \"node:crypto\"; export function quoteRemoteShellArg(va",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "dist/android/adb-runner.js",
"line": 1,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (dist/android/logcat-sessions.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`dist/android/logcat-sessions.js:5`): 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/android/logcat-sessions.js"
},
"evidence": "rt { spawn } from \"node:child_process\"; import { Transform } from \"node:stream\"; import { finished } from \"node:stream/p",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "dist/android/logcat-sessions.js",
"line": 5,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (dist/android/recording-analyze.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`dist/android/recording-analyze.js:1`): 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/android/recording-analyze.js"
},
"evidence": "rt { spawn } from \"node:child_process\"; import { mkdir, readFile, realpath, writeFile } from \"node:fs/promises\"; import",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "dist/android/recording-analyze.js",
"line": 1,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (dist/backends/companion.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`dist/backends/companion.js:1`): 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/backends/companion.js"
},
"evidence": "rt { spawn } from \"node:child_process\"; import { randomBytes } from \"node:crypto\"; import { Socket } from \"node:net\"; im",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "dist/backends/companion.js",
"line": 1,
"nonRuntime": false
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "mobile_server_info",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_devices_list",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_device_inspect",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_displays_list",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_screen_capture",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_screen_record",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_sessions_status",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_record_start",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_record_mark",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_record_stop",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_analyze_recording",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_theme_flash_report",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_focus_trace",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_focus_trace_start",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_focus_trace_stop",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_artifacts_list",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_artifacts_prune",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_screen_capture_pair",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_ui_snapshot",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_ui_find",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_ui_wait",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_input_tap",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_input_swipe",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_input_drag",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_input_key_combination",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_input_key",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_input_text",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_app_inspect",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_app_launch",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_app_stop",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_app_relaunch_on_displays",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_app_install",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_app_uninstall",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_diagnostics_collect",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_logcat",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_logcat_start",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_logcat_stop",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_diagnostics_activity_tops",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_diagnostics_layer_hints",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_power_wake",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_uimode_get",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_uimode_set",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_app_prefs_read",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_packages_list",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_default_apps_list",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_default_app_get",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_default_app_set",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_default_app_clear",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_notifications_list",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "mobile_notification_get",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "mobile_notification_post",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_broadcast_send",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_file_push",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_file_pull",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_performance_snapshot",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_permission_set",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_companion_install",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_companion_start",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_companion_key",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_companion_windows",
"tags": [],
"reasons": {}
},
{
"tool": "mobile_companion_stop",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "c6ecd167529f036b13217d598d3f640dcb437f14e4a243219ec2fd09119bca85",
"stats": {
"tools": 61,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 4,
"medium": 0,
"low": 0,
"info": 0
}
}
}