Facets Module — 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": "facets-module-mcp",
"source": {
"kind": "package",
"origin": "facets-module-mcp"
},
"server": {
"name": "facets-module-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": [
"sensitive-source",
"untrusted-input",
"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 (30 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 (facets_mcp/utils/ftf_command_utils.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`facets_mcp/utils/ftf_command_utils.py:56`): 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": "facets_mcp/utils/ftf_command_utils.py"
},
"evidence": "config result = subprocess.run( [\"git\", \"config\", \"--get\", \"remote.origin.url\"], cwd=wor",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "facets_mcp/utils/ftf_command_utils.py",
"line": 56,
"nonRuntime": false
}
},
{
"ruleId": "MTC-CAP-002",
"title": "Tool \"edit_file_block\" can modify the filesystem",
"category": "permissions",
"severity": "medium",
"confidence": "strong",
"description": "Tool \"edit_file_block\" can write, overwrite or delete files (keyword \"edit_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": "edit_file_block"
},
"data": {
"tags": [
"file-write"
]
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"edit_file_block\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"edit_file_block\" 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": "edit_file_block"
},
"data": {
"tags": [
"file-write"
]
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "list_test_projects",
"tags": [],
"reasons": {}
},
{
"tool": "test_already_previewed_module",
"tags": [],
"reasons": {}
},
{
"tool": "check_deployment_status",
"tags": [],
"reasons": {}
},
{
"tool": "get_deployment_logs",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"get_logs\""
]
}
},
{
"tool": "get_local_modules",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "search_modules_after_confirmation",
"tags": [],
"reasons": {}
},
{
"tool": "list_modules_for_fork",
"tags": [],
"reasons": {}
},
{
"tool": "fork_existing_module",
"tags": [],
"reasons": {}
},
{
"tool": "generate_module_with_user_confirmation",
"tags": [],
"reasons": {}
},
{
"tool": "mark_module_as_published",
"tags": [],
"reasons": {}
},
{
"tool": "register_output_type",
"tags": [],
"reasons": {}
},
{
"tool": "validate_module",
"tags": [],
"reasons": {}
},
{
"tool": "push_preview_module_to_facets_cp",
"tags": [],
"reasons": {}
},
{
"tool": "discover_terraform_resources",
"tags": [],
"reasons": {}
},
{
"tool": "add_import_declaration",
"tags": [],
"reasons": {}
},
{
"tool": "FIRST_STEP_get_instructions",
"tags": [],
"reasons": {}
},
{
"tool": "get_intent",
"tags": [],
"reasons": {}
},
{
"tool": "create_or_update_intent",
"tags": [],
"reasons": {}
},
{
"tool": "list_all_intents",
"tags": [],
"reasons": {}
},
{
"tool": "list_files",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"list_files\""
]
}
},
{
"tool": "read_file",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"read_file\""
]
}
},
{
"tool": "write_config_files",
"tags": [],
"reasons": {}
},
{
"tool": "write_resource_file",
"tags": [],
"reasons": {}
},
{
"tool": "get_output_type_details",
"tags": [],
"reasons": {}
},
{
"tool": "find_output_types_with_provider",
"tags": [],
"reasons": {}
},
{
"tool": "list_all_output_types",
"tags": [],
"reasons": {}
},
{
"tool": "write_outputs",
"tags": [],
"reasons": {}
},
{
"tool": "write_readme_file",
"tags": [],
"reasons": {}
},
{
"tool": "write_generic_file",
"tags": [],
"reasons": {}
},
{
"tool": "edit_file_block",
"tags": [
"file-write"
],
"reasons": {
"file-write": [
"keyword \"edit_file\" in tool name"
]
}
}
],
"surfaceDigest": "530e83cc104fd17267d4bae48cd83db990cafd2cbb8e11a914fa57cf58d14ee2",
"stats": {
"tools": 30,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 1,
"medium": 1,
"low": 1,
"info": 0
}
}
}