Robloxstudio — 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": "@6xvl/robloxstudio-mcp",
"source": {
"kind": "package",
"origin": "@6xvl/robloxstudio-mcp"
},
"server": {
"name": "@6xvl/robloxstudio-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": [
"can send data / act on an external service",
"can execute shell commands or code"
],
"tags": [
"code-exec",
"external-sink"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (137 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-CAP-001",
"title": "Tool \"breakpoints\" exposes command/code execution",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "Tool \"breakpoints\" appears to run shell commands or evaluate code (parameter \"script\"). 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": "breakpoints"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-CAP-001",
"title": "Tool \"eval_server_runtime\" exposes command/code execution",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "Tool \"eval_server_runtime\" appears to run shell commands or evaluate code (keyword \"eval\" 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": "eval_server_runtime"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-CAP-001",
"title": "Tool \"eval_client_runtime\" exposes command/code execution",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "Tool \"eval_client_runtime\" appears to run shell commands or evaluate code (keyword \"eval\" 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": "eval_client_runtime"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (dist/index.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`dist/index.js:2389`): 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/index.js"
},
"evidence": "{ execFileSync } from \"child_process\"; import { existsSync as existsSync2, readFileSync, readdirSync, statSync } from \"",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "dist/index.js",
"line": 2389,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-003",
"title": "Hardcoded egress to an external endpoint (dist/index.js)",
"category": "exfiltration",
"severity": "medium",
"confidence": "strong",
"description": "In the server's implementation (`dist/index.js:7340`): A hardcoded outbound call to a fixed external host inside server code is a classic exfiltration/telemetry channel — especially paired with reads of local data. 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/index.js"
},
"evidence": "const response = await fetch(`https://apis.roblox.com/universes/v1/places/${placeId}/universe`); if (!response.ok)",
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"data": {
"rule": "MTC-SRC-003",
"file": "dist/index.js",
"line": 7340,
"nonRuntime": false
}
},
{
"ruleId": "MTC-CAP-006",
"title": "Unconstrained command parameter \"script_path\" on \"breakpoints\"",
"category": "permissions",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"breakpoints\" takes a command-shaped parameter \"script_path\" with no enum/pattern constraint. Free-form, model- or attacker-controlled arguments reaching a shell is the command-injection precondition.",
"remediation": "Constrain the parameter (enum/pattern), or build the command from a fixed template with escaped args.",
"location": {
"kind": "tool",
"name": "breakpoints",
"field": "inputSchema.properties.script_path"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"param": "script_path"
}
},
{
"ruleId": "MTC-CAP-006",
"title": "Unconstrained command parameter \"code\" on \"eval_server_runtime\"",
"category": "permissions",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"eval_server_runtime\" takes a command-shaped parameter \"code\" with no enum/pattern constraint. Free-form, model- or attacker-controlled arguments reaching a shell is the command-injection precondition.",
"remediation": "Constrain the parameter (enum/pattern), or build the command from a fixed template with escaped args.",
"location": {
"kind": "tool",
"name": "eval_server_runtime",
"field": "inputSchema.properties.code"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"param": "code"
}
},
{
"ruleId": "MTC-CAP-006",
"title": "Unconstrained command parameter \"code\" on \"eval_client_runtime\"",
"category": "permissions",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"eval_client_runtime\" takes a command-shaped parameter \"code\" with no enum/pattern constraint. Free-form, model- or attacker-controlled arguments reaching a shell is the command-injection precondition.",
"remediation": "Constrain the parameter (enum/pattern), or build the command from a fixed template with escaped args.",
"location": {
"kind": "tool",
"name": "eval_client_runtime",
"field": "inputSchema.properties.code"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"param": "code"
}
},
{
"ruleId": "MTC-SRC-005",
"title": "Dynamic module load from a non-literal (studio-plugin/src/modules/LuauExec.ts)",
"category": "permissions",
"severity": "medium",
"confidence": "heuristic",
"description": "In the server's implementation (`studio-plugin/src/modules/LuauExec.ts:155`): Loading a module chosen at runtime (from a variable) can pull in and run attacker-influenced code paths. 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": "studio-plugin/src/modules/LuauExec.ts"
},
"evidence": "\\tend \\tlocal function require(module) \\t\\tlocal history_start = #__mcp_LogService:GetLogHistory() \\t\\tlocal ok, value",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-005",
"file": "studio-plugin/src/modules/LuauExec.ts",
"line": 155,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-005",
"title": "Dynamic module load from a non-literal (studio-plugin/src/modules/handlers/MicroProfilerHandlers.ts)",
"category": "permissions",
"severity": "medium",
"confidence": "heuristic",
"description": "In the server's implementation (`studio-plugin/src/modules/handlers/MicroProfilerHandlers.ts:406`): Loading a module chosen at runtime (from a variable) can pull in and run attacker-influenced code paths. 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": "studio-plugin/src/modules/handlers/MicroProfilerHandlers.ts"
},
"evidence": "libOrErr] = pcall(() => require(libModule) as LibMPLike); if (!ok) { return { error: \"libmp_require_failed\", me",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-005",
"file": "studio-plugin/src/modules/handlers/MicroProfilerHandlers.ts",
"line": 406,
"nonRuntime": false
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"breakpoints\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"breakpoints\" 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": "breakpoints"
},
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"eval_server_runtime\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"eval_server_runtime\" 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": "eval_server_runtime"
},
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"eval_client_runtime\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"eval_client_runtime\" 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": "eval_client_runtime"
},
"data": {
"tags": [
"code-exec"
]
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "robloxstudio-mcp-hook",
"tags": [],
"reasons": {}
},
{
"tool": "list_studios",
"tags": [],
"reasons": {}
},
{
"tool": "set_active_studio",
"tags": [],
"reasons": {}
},
{
"tool": "get_file_tree",
"tags": [],
"reasons": {}
},
{
"tool": "search_files",
"tags": [],
"reasons": {}
},
{
"tool": "get_place_info",
"tags": [],
"reasons": {}
},
{
"tool": "get_services",
"tags": [],
"reasons": {}
},
{
"tool": "search_objects",
"tags": [],
"reasons": {}
},
{
"tool": "get_instance_properties",
"tags": [],
"reasons": {}
},
{
"tool": "get_instance_children",
"tags": [],
"reasons": {}
},
{
"tool": "search_by_property",
"tags": [],
"reasons": {}
},
{
"tool": "get_class_info",
"tags": [],
"reasons": {}
},
{
"tool": "get_project_structure",
"tags": [],
"reasons": {}
},
{
"tool": "set_property",
"tags": [],
"reasons": {}
},
{
"tool": "mass_set_property",
"tags": [],
"reasons": {}
},
{
"tool": "mass_get_property",
"tags": [],
"reasons": {}
},
{
"tool": "set_properties",
"tags": [],
"reasons": {}
},
{
"tool": "create_object",
"tags": [],
"reasons": {}
},
{
"tool": "mass_create_objects",
"tags": [],
"reasons": {}
},
{
"tool": "delete_object",
"tags": [],
"reasons": {}
},
{
"tool": "smart_duplicate",
"tags": [],
"reasons": {}
},
{
"tool": "mass_duplicate",
"tags": [],
"reasons": {}
},
{
"tool": "get_script_source",
"tags": [],
"reasons": {}
},
{
"tool": "set_script_source",
"tags": [],
"reasons": {}
},
{
"tool": "edit_script_lines",
"tags": [],
"reasons": {}
},
{
"tool": "insert_script_lines",
"tags": [],
"reasons": {}
},
{
"tool": "delete_script_lines",
"tags": [],
"reasons": {}
},
{
"tool": "set_attribute",
"tags": [],
"reasons": {}
},
{
"tool": "get_attributes",
"tags": [],
"reasons": {}
},
{
"tool": "delete_attribute",
"tags": [],
"reasons": {}
},
{
"tool": "get_tags",
"tags": [],
"reasons": {}
},
{
"tool": "add_tag",
"tags": [],
"reasons": {}
},
{
"tool": "remove_tag",
"tags": [],
"reasons": {}
},
{
"tool": "get_tagged",
"tags": [],
"reasons": {}
},
{
"tool": "get_selection",
"tags": [],
"reasons": {}
},
{
"tool": "execute_luau",
"tags": [],
"reasons": {}
},
{
"tool": "grep_scripts",
"tags": [],
"reasons": {}
},
{
"tool": "start_playtest",
"tags": [],
"reasons": {}
},
{
"tool": "stop_playtest",
"tags": [],
"reasons": {}
},
{
"tool": "get_playtest_output",
"tags": [],
"reasons": {}
},
{
"tool": "get_connected_instances",
"tags": [],
"reasons": {}
},
{
"tool": "undo",
"tags": [],
"reasons": {}
},
{
"tool": "redo",
"tags": [],
"reasons": {}
},
{
"tool": "export_build",
"tags": [],
"reasons": {}
},
{
"tool": "create_build",
"tags": [],
"reasons": {}
},
{
"tool": "generate_build",
"tags": [],
"reasons": {}
},
{
"tool": "import_build",
"tags": [],
"reasons": {}
},
{
"tool": "list_library",
"tags": [],
"reasons": {}
},
{
"tool": "search_materials",
"tags": [],
"reasons": {}
},
{
"tool": "get_build",
"tags": [],
"reasons": {}
},
{
"tool": "import_scene",
"tags": [],
"reasons": {}
},
{
"tool": "search_assets",
"tags": [],
"reasons": {}
},
{
"tool": "get_asset_details",
"tags": [],
"reasons": {}
},
{
"tool": "get_asset_thumbnail",
"tags": [],
"reasons": {}
},
{
"tool": "insert_asset",
"tags": [],
"reasons": {}
},
{
"tool": "preview_asset",
"tags": [],
"reasons": {}
},
{
"tool": "upload_asset",
"tags": [],
"reasons": {}
},
{
"tool": "capture_screenshot",
"tags": [],
"reasons": {}
},
{
"tool": "simulate_mouse_input",
"tags": [],
"reasons": {}
},
{
"tool": "simulate_keyboard_input",
"tags": [],
"reasons": {}
},
{
"tool": "W",
"tags": [],
"reasons": {}
},
{
"tool": "character_navigation",
"tags": [],
"reasons": {}
},
{
"tool": "clone_object",
"tags": [],
"reasons": {}
},
{
"tool": "get_descendants",
"tags": [],
"reasons": {}
},
{
"tool": "compare_instances",
"tags": [],
"reasons": {}
},
{
"tool": "get_output_log",
"tags": [],
"reasons": {}
},
{
"tool": "bulk_set_attributes",
"tags": [],
"reasons": {}
},
{
"tool": "find_and_replace_in_scripts",
"tags": [],
"reasons": {}
},
{
"tool": "get_handler_health",
"tags": [],
"reasons": {}
},
{
"tool": "terrain_fill_block",
"tags": [],
"reasons": {}
},
{
"tool": "terrain_fill_ball",
"tags": [],
"reasons": {}
},
{
"tool": "terrain_fill_wedge",
"tags": [],
"reasons": {}
},
{
"tool": "terrain_fill_cylinder",
"tags": [],
"reasons": {}
},
{
"tool": "terrain_clear",
"tags": [],
"reasons": {}
},
{
"tool": "terrain_get_materials",
"tags": [],
"reasons": {}
},
{
"tool": "terrain_read_voxels",
"tags": [],
"reasons": {}
},
{
"tool": "lighting_list_presets",
"tags": [],
"reasons": {}
},
{
"tool": "lighting_set_preset",
"tags": [],
"reasons": {}
},
{
"tool": "lighting_get",
"tags": [],
"reasons": {}
},
{
"tool": "lighting_set",
"tags": [],
"reasons": {}
},
{
"tool": "diff_subtree",
"tags": [],
"reasons": {}
},
{
"tool": "animation_play",
"tags": [],
"reasons": {}
},
{
"tool": "animation_stop",
"tags": [],
"reasons": {}
},
{
"tool": "animation_list_tracks",
"tags": [],
"reasons": {}
},
{
"tool": "animation_load_keyframes",
"tags": [],
"reasons": {}
},
{
"tool": "particle_create",
"tags": [],
"reasons": {}
},
{
"tool": "particle_tune",
"tags": [],
"reasons": {}
},
{
"tool": "sound_play_preview",
"tags": [],
"reasons": {}
},
{
"tool": "sound_stop_preview",
"tags": [],
"reasons": {}
},
{
"tool": "sound_load_from_assetid",
"tags": [],
"reasons": {}
},
{
"tool": "sound_set_eq",
"tags": [],
"reasons": {}
},
{
"tool": "sound_set_reverb",
"tags": [],
"reasons": {}
},
{
"tool": "tween_preview",
"tags": [],
"reasons": {}
},
{
"tool": "textchat_configure",
"tags": [],
"reasons": {}
},
{
"tool": "textchat_create_command",
"tags": [],
"reasons": {}
},
{
"tool": "textchat_list_channels",
"tags": [],
"reasons": {}
},
{
"tool": "material_list_variants",
"tags": [],
"reasons": {}
},
{
"tool": "material_create_variant",
"tags": [],
"reasons": {}
},
{
"tool": "material_override_base",
"tags": [],
"reasons": {}
},
{
"tool": "profile_start",
"tags": [],
"reasons": {}
},
{
"tool": "profile_stop",
"tags": [],
"reasons": {}
},
{
"tool": "profile_snapshot",
"tags": [],
"reasons": {}
},
{
"tool": "humanoid_description_apply",
"tags": [],
"reasons": {}
},
{
"tool": "attribute_schema_validate",
"tags": [],
"reasons": {}
},
{
"tool": "streamingenabled_audit",
"tags": [],
"reasons": {}
},
{
"tool": "reparent_instance",
"tags": [],
"reasons": {}
},
{
"tool": "insert_service",
"tags": [],
"reasons": {}
},
{
"tool": "generate_mesh",
"tags": [],
"reasons": {}
},
{
"tool": "generate_material",
"tags": [],
"reasons": {}
},
{
"tool": "generate_procedural_model",
"tags": [],
"reasons": {}
},
{
"tool": "rojo_status",
"tags": [],
"reasons": {}
},
{
"tool": "wally_list",
"tags": [],
"reasons": {}
},
{
"tool": "package_publish",
"tags": [],
"reasons": {}
},
{
"tool": "physics_bake",
"tags": [],
"reasons": {}
},
{
"tool": "manage_instance",
"tags": [],
"reasons": {}
},
{
"tool": "solo_playtest",
"tags": [],
"reasons": {}
},
{
"tool": "multiplayer_playtest",
"tags": [],
"reasons": {}
},
{
"tool": "set_device_simulator",
"tags": [],
"reasons": {}
},
{
"tool": "get_device_simulator_state",
"tags": [],
"reasons": {}
},
{
"tool": "capture_device_matrix",
"tags": [],
"reasons": {}
},
{
"tool": "set_network_profile",
"tags": [],
"reasons": {}
},
{
"tool": "get_simulation_state",
"tags": [],
"reasons": {}
},
{
"tool": "reset_simulation_state",
"tags": [],
"reasons": {}
},
{
"tool": "capture_script_profiler",
"tags": [],
"reasons": {}
},
{
"tool": "capture_micro_profiler",
"tags": [],
"reasons": {}
},
{
"tool": "get_memory_breakdown",
"tags": [],
"reasons": {}
},
{
"tool": "get_scene_analysis",
"tags": [],
"reasons": {}
},
{
"tool": "breakpoints",
"tags": [
"code-exec"
],
"reasons": {
"code-exec": [
"parameter \"script\""
]
}
},
{
"tool": "selection",
"tags": [],
"reasons": {}
},
{
"tool": "export_rbxm",
"tags": [],
"reasons": {}
},
{
"tool": "import_rbxm",
"tags": [],
"reasons": {}
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