Sandbox Studio — 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": "sandbox-studio-mcp",
"source": {
"kind": "package",
"origin": "sandbox-studio-mcp"
},
"server": {
"name": "sandbox-studio-mcp"
}
},
"grade": "A",
"score": {
"score": 92,
"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": "none",
"label": "publisher verification (unlinked) — no provenance/repo link, but the shipped source was fully read",
"appliedPenalty": 2
},
{
"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 (81 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 \"update_cleanup_hook\" exposes command/code execution",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "Tool \"update_cleanup_hook\" 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": "update_cleanup_hook"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-FLOW-005",
"title": "Untrusted input can drive an external action",
"category": "exfiltration",
"severity": "medium",
"confidence": "strong",
"description": "Untrusted-input tools ([list_accounts, list_unregistered_accounts, get_account_lease_history, list_approvals, list_events, list_leases, list_public_templates, list_managed_templates, get_template_leases, list_users, list_groups]) co-exist with external-action tools ([update_cleanup_hook]). A prompt injection could cause unwanted external actions, though no direct sensitive-data leak path was found.",
"remediation": "Require confirmation for state-changing/egress actions triggered after processing untrusted content.",
"location": {
"kind": "flow",
"name": "list_accounts → update_cleanup_hook"
},
"evidence": "untrusted [list_accounts, list_unregistered_accounts, get_account_lease_history, list_approvals, list_events, list_leases, list_public_templates, list_managed_t",
"owasp": "LLM06:2025 Excessive Agency",
"references": [],
"data": {
"untrusted": [
"list_accounts",
"list_unregistered_accounts",
"get_account_lease_history",
"list_approvals",
"list_events",
"list_leases",
"list_public_templates",
"list_managed_templates",
"get_template_leases",
"list_users",
"list_groups"
],
"sinks": [
"update_cleanup_hook"
]
}
},
{
"ruleId": "MTC-CAP-006",
"title": "Unconstrained command parameter \"script\" on \"update_cleanup_hook\"",
"category": "permissions",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"update_cleanup_hook\" takes a command-shaped parameter \"script\" 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": "update_cleanup_hook",
"field": "inputSchema.properties.script"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"param": "script"
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"update_cleanup_hook\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"update_cleanup_hook\" 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": "update_cleanup_hook"
},
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-SUP-011",
"title": "Package declares no source repository",
"category": "supply-chain",
"severity": "info",
"confidence": "strong",
"description": "\"sandbox-studio-mcp\" declares no repository URL, so its published artifact cannot be compared against reviewable source.",
"remediation": "Prefer packages that link to public, reviewable source.",
"location": {
"kind": "package",
"name": "sandbox-studio-mcp"
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "medium",
"confidence": "strong",
"untrustedInput": [
"list_accounts",
"list_unregistered_accounts",
"get_account_lease_history",
"list_approvals",
"list_events",
"list_leases",
"list_public_templates",
"list_managed_templates",
"get_template_leases",
"list_users",
"list_groups"
],
"sensitiveSource": [],
"externalSink": [
"update_cleanup_hook"
],
"selfContained": false,
"description": "Untrusted input can drive an external action even though no sensitive source is exposed."
}
],
"capabilities": [
{
"tool": "list_accounts",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "import_accounts",
"tags": [],
"reasons": {}
},
{
"tool": "eject_accounts",
"tags": [],
"reasons": {}
},
{
"tool": "list_unregistered_accounts",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "get_account",
"tags": [],
"reasons": {}
},
{
"tool": "get_account_lease_history",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "retry_account_cleanup",
"tags": [],
"reasons": {}
},
{
"tool": "get_account_cleanup_logs",
"tags": [],
"reasons": {}
},
{
"tool": "get_account_failed_resources",
"tags": [],
"reasons": {}
},
{
"tool": "list_approvals",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "list_events",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "create_event",
"tags": [],
"reasons": {}
},
{
"tool": "get_event",
"tags": [],
"reasons": {}
},
{
"tool": "update_event",
"tags": [],
"reasons": {}
},
{
"tool": "get_event_teams",
"tags": [],
"reasons": {}
},
{
"tool": "add_event_teams",
"tags": [],
"reasons": {}
},
{
"tool": "terminate_event",
"tags": [],
"reasons": {}
},
{
"tool": "start_event",
"tags": [],
"reasons": {}
},
{
"tool": "provision_event",
"tags": [],
"reasons": {}
},
{
"tool": "assign_event_team_owner",
"tags": [],
"reasons": {}
},
{
"tool": "get_lease_costs",
"tags": [],
"reasons": {}
},
{
"tool": "trigger_drift_detection",
"tags": [],
"reasons": {}
},
{
"tool": "trigger_lease_monitoring",
"tags": [],
"reasons": {}
},
{
"tool": "list_leases",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "get_lease",
"tags": [],
"reasons": {}
},
{
"tool": "request_lease",
"tags": [],
"reasons": {}
},
{
"tool": "update_lease",
"tags": [],
"reasons": {}
},
{
"tool": "suspend_lease",
"tags": [],
"reasons": {}
},
{
"tool": "resume_lease",
"tags": [],
"reasons": {}
},
{
"tool": "review_lease",
"tags": [],
"reasons": {}
},
{
"tool": "terminate_lease",
"tags": [],
"reasons": {}
},
{
"tool": "withdraw_lease",
"tags": [],
"reasons": {}
},
{
"tool": "get_lease_team_members",
"tags": [],
"reasons": {}
},
{
"tool": "share_lease",
"tags": [],
"reasons": {}
},
{
"tool": "unshare_lease",
"tags": [],
"reasons": {}
},
{
"tool": "get_lease_logs",
"tags": [],
"reasons": {}
},
{
"tool": "get_lease_secrets",
"tags": [],
"reasons": {}
},
{
"tool": "get_cleanup_settings",
"tags": [],
"reasons": {}
},
{
"tool": "update_cleanup_settings",
"tags": [],
"reasons": {}
},
{
"tool": "get_cleanup_hook",
"tags": [],
"reasons": {}
},
{
"tool": "update_cleanup_hook",
"tags": [
"code-exec"
],
"reasons": {
"code-exec": [
"parameter \"script\""
]
}
},
{
"tool": "get_email_settings",
"tags": [],
"reasons": {}
},
{
"tool": "update_email_settings",
"tags": [],
"reasons": {}
},
{
"tool": "send_test_email",
"tags": [],
"reasons": {}
},
{
"tool": "get_smtp_settings",
"tags": [],
"reasons": {}
},
{
"tool": "update_smtp_settings",
"tags": [],
"reasons": {}
},
{
"tool": "get_global_config",
"tags": [],
"reasons": {}
},
{
"tool": "update_global_config",
"tags": [],
"reasons": {}
},
{
"tool": "get_runtime_config",
"tags": [],
"reasons": {}
},
{
"tool": "list_public_templates",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "get_template",
"tags": [],
"reasons": {}
},
{
"tool": "get_template_info",
"tags": [],
"reasons": {}
},
{
"tool": "list_managed_templates",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "create_template",
"tags": [],
"reasons": {}
},
{
"tool": "delete_template",
"tags": [],
"reasons": {}
},
{
"tool": "update_template_info",
"tags": [],
"reasons": {}
},
{
"tool": "get_template_leases",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "get_template_permissions",
"tags": [],
"reasons": {}
},
{
"tool": "update_template_permissions",
"tags": [],
"reasons": {}
},
{
"tool": "get_template_launch_settings",
"tags": [],
"reasons": {}
},
{
"tool": "update_template_launch_settings",
"tags": [],
"reasons": {}
},
{
"tool": "update_template_budget",
"tags": [],
"reasons": {}
},
{
"tool": "update_template_duration",
"tags": [],
"reasons": {}
},
{
"tool": "update_template_managers",
"tags": [],
"reasons": {}
},
{
"tool": "update_template_sharing",
"tags": [],
"reasons": {}
},
{
"tool": "update_template_tags",
"tags": [],
"reasons": {}
},
{
"tool": "list_users",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "list_groups",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "validate_users",
"tags": [],
"reasons": {}
},
{
"tool": "update_preferences",
"tags": [],
"reasons": {}
},
{
"tool": "list_all_oauth_clients",
"tags": [],
"reasons": {}
},
{
"tool": "list_my_oauth_clients",
"tags": [],
"reasons": {}
},
{
"tool": "create_oauth_client",
"tags": [],
"reasons": {}
},
{
"tool": "delete_oauth_client",
"tags": [],
"reasons": {}
},
{
"tool": "update_oauth_client",
"tags": [],
"reasons": {}
},
{
"tool": "get_terms_of_service",
"tags": [],
"reasons": {}
},
{
"tool": "list_terms_versions",
"tags": [],
"reasons": {}
},
{
"tool": "get_terms_version",
"tags": [],
"reasons": {}
},
{
"tool": "publish_terms_of_service",
"tags": [],
"reasons": {}
},
{
"tool": "get_tags",
"tags": [],
"reasons": {}
},
{
"tool": "validate_s3_path",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "07519d3a681be7ea92901e7288f691005d90f835c5e53b6c1e7798b8267ecc57",
"stats": {
"tools": 81,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 1,
"medium": 2,
"low": 1,
"info": 1
}
}
}