Echo — 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": "echo-mcp",
"source": {
"kind": "package",
"origin": "echo-mcp"
},
"server": {
"name": "echo-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 create, modify or delete files",
"reads sensitive or local data",
"has a read → egress path (a data-exfiltration surface)",
"can execute shell commands or code"
],
"tags": [
"untrusted-input",
"sensitive-source",
"file-write",
"code-exec"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (58 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 (config.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`config.py:12`): 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": "config.py"
},
"evidence": "try: result = subprocess.run( cmd, capture_output=True, text=True,",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "config.py",
"line": 12,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (src/echo_mcp/config.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/echo_mcp/config.py:12`): 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/echo_mcp/config.py"
},
"evidence": "try: result = subprocess.run( cmd, capture_output=True, text=True,",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "src/echo_mcp/config.py",
"line": 12,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (src/echo_mcp/main.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/echo_mcp/main.py:77`): 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/echo_mcp/main.py"
},
"evidence": "\"\"\" result = subprocess.run( [\"powershell\", \"-NoProfile\", \"-ExecutionPolicy\", \"RemoteSigned\", \"-",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "src/echo_mcp/main.py",
"line": 77,
"nonRuntime": false
}
},
{
"ruleId": "MTC-CAP-002",
"title": "Tool \"delete_file\" can modify the filesystem",
"category": "permissions",
"severity": "medium",
"confidence": "strong",
"description": "Tool \"delete_file\" can write, overwrite or delete files (keyword \"delete_file\" in tool name). Verify it is scoped to a safe directory.",
"remediation": "Constrain file operations to an explicit, non-sensitive root; reject path traversal.",
"location": {
"kind": "tool",
"name": "delete_file"
},
"data": {
"tags": [
"file-write"
]
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"delete_file\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"delete_file\" 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": "delete_file"
},
"data": {
"tags": [
"file-write"
]
}
},
{
"ruleId": "MTC-SUP-012",
"title": "Package has no license",
"category": "hygiene",
"severity": "info",
"confidence": "strong",
"description": "\"echo-mcp\" has no declared license. This is a legal/reuse concern, not a security finding.",
"location": {
"kind": "package",
"name": "echo-mcp"
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "get_text_at_coords",
"tags": [],
"reasons": {}
},
{
"tool": "find_text_on_screen",
"tags": [],
"reasons": {}
},
{
"tool": "set_volume",
"tags": [],
"reasons": {}
},
{
"tool": "get_window_geometry",
"tags": [],
"reasons": {}
},
{
"tool": "close_all_windows_by_title",
"tags": [],
"reasons": {}
},
{
"tool": "system_power",
"tags": [],
"reasons": {}
},
{
"tool": "ping",
"tags": [],
"reasons": {}
},
{
"tool": "download_file",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"download\""
]
}
},
{
"tool": "get_process_stats",
"tags": [],
"reasons": {}
},
{
"tool": "wait_for_process",
"tags": [],
"reasons": {}
},
{
"tool": "get_active_window_info",
"tags": [],
"reasons": {}
},
{
"tool": "kill_process",
"tags": [],
"reasons": {}
},
{
"tool": "get_system_health",
"tags": [],
"reasons": {}
},
{
"tool": "launch_application",
"tags": [],
"reasons": {}
},
{
"tool": "get_screen_size",
"tags": [],
"reasons": {}
},
{
"tool": "mouse_click",
"tags": [],
"reasons": {}
},
{
"tool": "click_element",
"tags": [],
"reasons": {}
},
{
"tool": "type_text",
"tags": [],
"reasons": {}
},
{
"tool": "take_screenshot",
"tags": [],
"reasons": {}
},
{
"tool": "list_directory",
"tags": [],
"reasons": {}
},
{
"tool": "read_file_content",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"read_file\""
]
}
},
{
"tool": "write_to_file",
"tags": [],
"reasons": {}
},
{
"tool": "move_mouse",
"tags": [],
"reasons": {}
},
{
"tool": "mouse_drag",
"tags": [],
"reasons": {}
},
{
"tool": "mouse_scroll",
"tags": [],
"reasons": {}
},
{
"tool": "press_key",
"tags": [],
"reasons": {}
},
{
"tool": "hotkey",
"tags": [],
"reasons": {}
},
{
"tool": "mouse_double_click",
"tags": [],
"reasons": {}
},
{
"tool": "get_mouse_position",
"tags": [],
"reasons": {}
},
{
"tool": "list_all_windows",
"tags": [],
"reasons": {}
},
{
"tool": "focus_window",
"tags": [],
"reasons": {}
},
{
"tool": "maximize_window",
"tags": [],
"reasons": {}
},
{
"tool": "minimize_window",
"tags": [],
"reasons": {}
},
{
"tool": "list_processes",
"tags": [],
"reasons": {}
},
{
"tool": "get_disk_usage",
"tags": [],
"reasons": {}
},
{
"tool": "delete_file",
"tags": [
"file-write"
],
"reasons": {
"file-write": [
"keyword \"delete_file\" in tool name"
]
}
},
{
"tool": "create_directory",
"tags": [],
"reasons": {}
},
{
"tool": "wait",
"tags": [],
"reasons": {}
},
{
"tool": "get_clipboard",
"tags": [],
"reasons": {}
},
{
"tool": "set_clipboard",
"tags": [],
"reasons": {}
},
{
"tool": "open_url",
"tags": [],
"reasons": {}
},
{
"tool": "get_environment_variable",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"get_env\""
]
}
},
{
"tool": "list_network_interfaces",
"tags": [],
"reasons": {}
},
{
"tool": "browser_open",
"tags": [],
"reasons": {}
},
{
"tool": "browser_navigate",
"tags": [],
"reasons": {}
},
{
"tool": "browser_find_element",
"tags": [],
"reasons": {}
},
{
"tool": "browser_click",
"tags": [],
"reasons": {}
},
{
"tool": "browser_fill_form",
"tags": [],
"reasons": {}
},
{
"tool": "browser_extract_text",
"tags": [],
"reasons": {}
},
{
"tool": "browser_screenshot",
"tags": [],
"reasons": {}
},
{
"tool": "browser_get_page_source",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"get_page\""
]
}
},
{
"tool": "browser_execute_script",
"tags": [],
"reasons": {}
},
{
"tool": "browser_wait_for_element",
"tags": [],
"reasons": {}
},
{
"tool": "browser_get_title",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"get_page\""
]
}
},
{
"tool": "browser_get_url",
"tags": [],
"reasons": {}
},
{
"tool": "browser_close",
"tags": [],
"reasons": {}
},
{
"tool": "browser_scroll",
"tags": [],
"reasons": {}
},
{
"tool": "web_scrape_to_file",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"scrape\""
]
}
}
],
"surfaceDigest": "42f6460f54e1cc024a211cdfc659571d82b309f4e9752abf4c43ed52cae2133a",
"stats": {
"tools": 58,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 3,
"medium": 1,
"low": 1,
"info": 1
}
}
}