Uiautomator2 — the complete, unedited output of the deterministic mcptrustchecker engine v1.9.0, scanned . Every finding, capability tag and score component below is exactly what the engine produced — no AI, no post-processing.
{
"tool": {
"name": "mcptrustchecker",
"version": "1.9.0",
"methodologyVersion": "mcptrustchecker-1.9"
},
"target": {
"id": "uiautomator2-mcp",
"source": {
"kind": "package",
"origin": "uiautomator2-mcp"
},
"server": {
"name": "uiautomator2-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-1.9"
},
"capability": {
"level": "high",
"reasons": [
"reads sensitive or local data",
"has a read → egress path (a data-exfiltration surface)",
"can execute shell commands or code"
],
"tags": [
"sensitive-source",
"code-exec"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (54 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-004",
"title": "Sensitive-source and external-sink co-exist",
"category": "exfiltration",
"severity": "high",
"confidence": "strong",
"description": "Tools that read sensitive data ([dump_hierarchy, get_logs]) and tools that can send data out ([shell]) are exposed together. An agent can move private data to the sink.",
"remediation": "Keep secret-reading and egress capabilities on separate, separately-approved servers.",
"location": {
"kind": "flow",
"name": "dump_hierarchy → shell"
},
"evidence": "sources [dump_hierarchy, get_logs] → sinks [shell]",
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"references": [],
"data": {
"sources": [
"dump_hierarchy",
"get_logs"
],
"sinks": [
"shell"
]
}
},
{
"ruleId": "MTC-CAP-001",
"title": "Tool \"shell\" exposes command/code execution",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "Tool \"shell\" appears to run shell commands or evaluate code (keyword \"shell\" in tool name). Arbitrary execution driven by model input is one of the most dangerous MCP capabilities; combined with any untrusted input it becomes RCE.",
"remediation": "Sandbox execution, allowlist commands/arguments, and never pass model output to a shell unescaped.",
"location": {
"kind": "tool",
"name": "shell"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (src/uiautomator2_mcp/adb_tools.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/uiautomator2_mcp/adb_tools.py:65`): 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": "src/uiautomator2_mcp/adb_tools.py"
},
"evidence": "e-data\") process = subprocess.Popen( command, stdout=subprocess.DEVNULL, stderr=subprocess.",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "src/uiautomator2_mcp/adb_tools.py",
"line": 65,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (src/uiautomator2_mcp/logcat.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/uiautomator2_mcp/logcat.py:216`): 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": "src/uiautomator2_mcp/logcat.py"
},
"evidence": "al, *args] result = subprocess.run( command, capture_output=True, text=True, check=F",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "src/uiautomator2_mcp/logcat.py",
"line": 216,
"nonRuntime": false
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"shell\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"shell\" can mutate/egress but declares no destructiveHint. Clients that don't default to spec-safe behavior may not prompt before running it.",
"remediation": "Declare accurate annotations, and gate destructive tools on user confirmation regardless.",
"location": {
"kind": "tool",
"name": "shell"
},
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-SUP-012",
"title": "Package has no license",
"category": "hygiene",
"severity": "info",
"confidence": "strong",
"description": "\"uiautomator2-mcp\" has no declared license. This is a legal/reuse concern, not a security finding.",
"location": {
"kind": "package",
"name": "uiautomator2-mcp"
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "high",
"confidence": "strong",
"untrustedInput": [],
"sensitiveSource": [
"dump_hierarchy",
"get_logs"
],
"externalSink": [
"shell"
],
"selfContained": false,
"path": [
"dump_hierarchy",
"shell"
],
"pathWired": false,
"description": "A sensitive-source → external-sink chain exists: dump_hierarchy → shell."
}
],
"capabilities": [
{
"tool": "connect",
"tags": [],
"reasons": {}
},
{
"tool": "disconnect",
"tags": [],
"reasons": {}
},
{
"tool": "list_devices",
"tags": [],
"reasons": {}
},
{
"tool": "list_avds",
"tags": [],
"reasons": {}
},
{
"tool": "start_emulator",
"tags": [],
"reasons": {}
},
{
"tool": "device_info",
"tags": [],
"reasons": {}
},
{
"tool": "tap",
"tags": [],
"reasons": {}
},
{
"tool": "double_tap",
"tags": [],
"reasons": {}
},
{
"tool": "long_tap",
"tags": [],
"reasons": {}
},
{
"tool": "swipe",
"tags": [],
"reasons": {}
},
{
"tool": "drag",
"tags": [],
"reasons": {}
},
{
"tool": "input_text",
"tags": [],
"reasons": {}
},
{
"tool": "press_key",
"tags": [],
"reasons": {}
},
{
"tool": "multi_tap",
"tags": [],
"reasons": {}
},
{
"tool": "find_element",
"tags": [],
"reasons": {}
},
{
"tool": "tap_element",
"tags": [],
"reasons": {}
},
{
"tool": "double_tap_element",
"tags": [],
"reasons": {}
},
{
"tool": "set_element_text",
"tags": [],
"reasons": {}
},
{
"tool": "element_exists",
"tags": [],
"reasons": {}
},
{
"tool": "wait_element",
"tags": [],
"reasons": {}
},
{
"tool": "tap_and_wait",
"tags": [],
"reasons": {}
},
{
"tool": "tap_sequence",
"tags": [],
"reasons": {}
},
{
"tool": "scroll_to_element",
"tags": [],
"reasons": {}
},
{
"tool": "scroll",
"tags": [],
"reasons": {}
},
{
"tool": "fling",
"tags": [],
"reasons": {}
},
{
"tool": "wait_element_gone",
"tags": [],
"reasons": {}
},
{
"tool": "get_toast",
"tags": [],
"reasons": {}
},
{
"tool": "watcher_add",
"tags": [],
"reasons": {}
},
{
"tool": "watcher_start",
"tags": [],
"reasons": {}
},
{
"tool": "watcher_stop",
"tags": [],
"reasons": {}
},
{
"tool": "watcher_remove",
"tags": [],
"reasons": {}
},
{
"tool": "screenshot",
"tags": [],
"reasons": {}
},
{
"tool": "dump_hierarchy",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"dump\""
]
}
},
{
"tool": "get_ui_tree",
"tags": [],
"reasons": {}
},
{
"tool": "app_start",
"tags": [],
"reasons": {}
},
{
"tool": "app_stop",
"tags": [],
"reasons": {}
},
{
"tool": "app_install",
"tags": [],
"reasons": {}
},
{
"tool": "app_uninstall",
"tags": [],
"reasons": {}
},
{
"tool": "app_clear",
"tags": [],
"reasons": {}
},
{
"tool": "app_info",
"tags": [],
"reasons": {}
},
{
"tool": "app_list_running",
"tags": [],
"reasons": {}
},
{
"tool": "current_app",
"tags": [],
"reasons": {}
},
{
"tool": "screen_on",
"tags": [],
"reasons": {}
},
{
"tool": "screen_off",
"tags": [],
"reasons": {}
},
{
"tool": "unlock",
"tags": [],
"reasons": {}
},
{
"tool": "open_notification",
"tags": [],
"reasons": {}
},
{
"tool": "open_quick_settings",
"tags": [],
"reasons": {}
},
{
"tool": "get_clipboard",
"tags": [],
"reasons": {}
},
{
"tool": "set_clipboard",
"tags": [],
"reasons": {}
},
{
"tool": "clear_logs",
"tags": [],
"reasons": {}
},
{
"tool": "get_logs",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"get_logs\""
]
}
},
{
"tool": "shell",
"tags": [
"code-exec"
],
"reasons": {
"code-exec": [
"keyword \"shell\" in tool name"
]
}
},
{
"tool": "push_file",
"tags": [],
"reasons": {}
},
{
"tool": "pull_file",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "28aeeb64c2cd3c82bb15bdb571a94aa35eb9cfaf38d5f88173f82cb40eac6f16",
"stats": {
"tools": 54,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 4,
"medium": 0,
"low": 1,
"info": 1
}
}
}