Nimbus — 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": "nimbus-mcp",
"source": {
"kind": "package",
"origin": "nimbus-mcp"
},
"server": {
"name": "nimbus-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": [
"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 (87 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 ([aws_scan_secrets_manager, Get Secret Value]) and tools that can send data out ([SSM Run Command]) 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": "aws_scan_secrets_manager → SSM Run Command"
},
"evidence": "sources [aws_scan_secrets_manager, Get Secret Value] → sinks [SSM Run Command]",
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"references": [],
"data": {
"sources": [
"aws_scan_secrets_manager",
"Get Secret Value"
],
"sinks": [
"SSM Run Command"
]
}
},
{
"ruleId": "MTC-CAP-001",
"title": "Tool \"SSM Run Command\" exposes command/code execution",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "Tool \"SSM Run Command\" appears to run shell commands or evaluate code (keyword \"run_command\" 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": "SSM Run Command"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"SSM Run Command\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"SSM Run Command\" 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": "SSM Run Command"
},
"data": {
"tags": [
"code-exec"
]
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "high",
"confidence": "strong",
"untrustedInput": [],
"sensitiveSource": [
"aws_scan_secrets_manager",
"Get Secret Value"
],
"externalSink": [
"SSM Run Command"
],
"selfContained": false,
"path": [
"Get Secret Value",
"SSM Run Command"
],
"pathWired": false,
"description": "A sensitive-source → external-sink chain exists: Get Secret Value → SSM Run Command."
}
],
"capabilities": [
{
"tool": "aws_help",
"tags": [],
"reasons": {}
},
{
"tool": "aws_whoami",
"tags": [],
"reasons": {}
},
{
"tool": "aws_enumerate_ec2_instances",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_s3_security",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_iam_users",
"tags": [],
"reasons": {}
},
{
"tool": "aws_enumerate_iam_roles",
"tags": [],
"reasons": {}
},
{
"tool": "aws_enumerate_rds_databases",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_network_security",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_lambda_security",
"tags": [],
"reasons": {}
},
{
"tool": "aws_enumerate_eks_clusters",
"tags": [],
"reasons": {}
},
{
"tool": "aws_scan_secrets_manager",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"list_secrets\""
]
}
},
{
"tool": "aws_enumerate_public_resources",
"tags": [],
"reasons": {}
},
{
"tool": "aws_generate_security_report",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_encryption_security",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_api_distribution_security",
"tags": [],
"reasons": {}
},
{
"tool": "aws_scan_eks_irsa_risks",
"tags": [],
"reasons": {}
},
{
"tool": "aws_scan_elasticache_security",
"tags": [],
"reasons": {}
},
{
"tool": "aws_get_guardduty_findings",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_messaging_security",
"tags": [],
"reasons": {}
},
{
"tool": "aws_generate_tra_report",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_infrastructure_automation",
"tags": [],
"reasons": {}
},
{
"tool": "aws_enumerate_organizations",
"tags": [],
"reasons": {}
},
{
"tool": "aws_enumerate_detection_services",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_iam_trust_chains",
"tags": [],
"reasons": {}
},
{
"tool": "aws_detect_permissive_roles",
"tags": [],
"reasons": {}
},
{
"tool": "aws_detect_persistence_mechanisms",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_service_role_chain",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_cross_account_movement",
"tags": [],
"reasons": {}
},
{
"tool": "aws_detect_mfa_bypass_vectors",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_cloudwatch_security",
"tags": [],
"reasons": {}
},
{
"tool": "aws_scan_ssm_security",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_ec2_metadata_exposure",
"tags": [],
"reasons": {}
},
{
"tool": "aws_scan_resource_policies",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_network_exposure",
"tags": [],
"reasons": {}
},
{
"tool": "aws_detect_data_exfiltration_paths",
"tags": [],
"reasons": {}
},
{
"tool": "aws_scan_eks_service_accounts",
"tags": [],
"reasons": {}
},
{
"tool": "aws_hunt_eks_secrets",
"tags": [],
"reasons": {}
},
{
"tool": "aws_scan_lambda_cold_start_risks",
"tags": [],
"reasons": {}
},
{
"tool": "aws_scan_api_gateway_auth",
"tags": [],
"reasons": {}
},
{
"tool": "aws_scan_all_regions",
"tags": [],
"reasons": {}
},
{
"tool": "aws_scan_container_registry_poisoning",
"tags": [],
"reasons": {}
},
{
"tool": "aws_list_active_regions",
"tags": [],
"reasons": {}
},
{
"tool": "aws_cache_stats",
"tags": [],
"reasons": {}
},
{
"tool": "aws_cache_clear",
"tags": [],
"reasons": {}
},
{
"tool": "aws_build_attack_chains",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_eks_attack_surface",
"tags": [],
"reasons": {}
},
{
"tool": "aws_detect_privesc_patterns",
"tags": [],
"reasons": {}
},
{
"tool": "aws_analyze_ami_security",
"tags": [],
"reasons": {}
},
{
"tool": "aws_get_audit_logs",
"tags": [],
"reasons": {}
},
{
"tool": "PassRole to Lambda",
"tags": [],
"reasons": {}
},
{
"tool": "PassRole to EC2",
"tags": [],
"reasons": {}
},
{
"tool": "PassRole to Glue",
"tags": [],
"reasons": {}
},
{
"tool": "PassRole to CloudFormation",
"tags": [],
"reasons": {}
},
{
"tool": "PassRole to CodeBuild",
"tags": [],
"reasons": {}
},
{
"tool": "PassRole to SageMaker",
"tags": [],
"reasons": {}
},
{
"tool": "PassRole to ECS Task",
"tags": [],
"reasons": {}
},
{
"tool": "Attach Administrator Policy",
"tags": [],
"reasons": {}
},
{
"tool": "Attach Policy to Role",
"tags": [],
"reasons": {}
},
{
"tool": "Create Inline User Policy",
"tags": [],
"reasons": {}
},
{
"tool": "Create Inline Role Policy",
"tags": [],
"reasons": {}
},
{
"tool": "Create Policy Version",
"tags": [],
"reasons": {}
},
{
"tool": "Set Default Policy Version",
"tags": [],
"reasons": {}
},
{
"tool": "Create Access Key",
"tags": [],
"reasons": {}
},
{
"tool": "Create Login Profile",
"tags": [],
"reasons": {}
},
{
"tool": "Update Login Profile",
"tags": [],
"reasons": {}
},
{
"tool": "Update Assume Role Policy",
"tags": [],
"reasons": {}
},
{
"tool": "IRSA Pod Execution Abuse",
"tags": [],
"reasons": {}
},
{
"tool": "EKS Node Role Credential Theft",
"tags": [],
"reasons": {}
},
{
"tool": "EKS Cluster Admin Access",
"tags": [],
"reasons": {}
},
{
"tool": "EKS Fargate Profile PassRole",
"tags": [],
"reasons": {}
},
{
"tool": "EKS Wildcard Describe",
"tags": [],
"reasons": {}
},
{
"tool": "Update Lambda Code",
"tags": [],
"reasons": {}
},
{
"tool": "Add Malicious Lambda Layer",
"tags": [],
"reasons": {}
},
{
"tool": "Lambda Environment Variable Secrets",
"tags": [],
"reasons": {}
},
{
"tool": "SSM Run Command",
"tags": [
"code-exec"
],
"reasons": {
"code-exec": [
"keyword \"run_command\" in tool name"
]
}
},
{
"tool": "SSM Start Session",
"tags": [],
"reasons": {}
},
{
"tool": "SSM Parameter Store Secrets",
"tags": [],
"reasons": {}
},
{
"tool": "S3 Data Exfiltration",
"tags": [],
"reasons": {}
},
{
"tool": "Modify S3 Bucket Policy",
"tags": [],
"reasons": {}
},
{
"tool": "Get Secret Value",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"get_secret\""
]
}
},
{
"tool": "Stop CloudTrail Logging",
"tags": [],
"reasons": {}
},
{
"tool": "Delete CloudTrail",
"tags": [],
"reasons": {}
},
{
"tool": "Disable GuardDuty",
"tags": [],
"reasons": {}
},
{
"tool": "Lambda Layer Backdoor",
"tags": [],
"reasons": {}
},
{
"tool": "Public API Server Endpoint",
"tags": [],
"reasons": {}
},
{
"tool": "Missing Control Plane Logging",
"tags": [],
"reasons": {}
},
{
"tool": "etcd Secrets Encryption Not Enabled",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "935ef02ca118f1f2fb1826379e89780296a74bec34da7cebc1c39cf152a357a5",
"stats": {
"tools": 87,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 2,
"medium": 0,
"low": 1,
"info": 0
}
}
}