Zerno — the complete, unedited output of the deterministic mcptrustchecker engine v1.9.0, scanned . Every finding, capability tag and score component below is exactly what the engine produced — no AI, no post-processing.
{
"tool": {
"name": "mcptrustchecker",
"version": "1.9.0",
"methodologyVersion": "mcptrustchecker-1.9"
},
"target": {
"id": "zerno-mcp",
"source": {
"kind": "package",
"origin": "zerno-mcp"
},
"server": {
"name": "zerno-mcp"
}
},
"grade": "A",
"score": {
"score": 99,
"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": "minimal",
"label": "capability blast radius (minimal) — client exposure if the model is manipulated",
"appliedPenalty": 0
},
{
"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-1.9"
},
"capability": {
"level": "minimal",
"reasons": [],
"tags": []
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (34 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 packaging/dev tooling (dist/setup.js)",
"category": "permissions",
"severity": "low",
"confidence": "heuristic",
"description": "In a packaging/dev/install script (shipped, but not the server runtime) (`dist/setup.js:2`): 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/setup.js"
},
"evidence": "spawnSync } from \"node:child_process\"; import { createHash, randomBytes } from \"node:crypto\"; import { existsSync, mkdi",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "dist/setup.js",
"line": 2,
"nonRuntime": true
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "zerno_get_runtime_config",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_get_project_context",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_get_stage",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_list_ready_tasks",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_list_tasks",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_update_task",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_bulk_score_backlog",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_submit_task_triage",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_merge_tasks",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_get_backlog_health",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_strategy_brief",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_align_backlog",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_product_health",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_weekly_review",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_get_execution_policy",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_get_agent_settings",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_get_task",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_resume_task",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_checkpoint",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_log_task_event",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_upload_plan",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_upload_report",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_update_task_status",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_create_agent_intake_task",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_memory_snapshot",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_memory_search",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_memory_list_decisions",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_memory_list_bets",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_memory_list_constraints",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_memory_list_notes",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_run_start",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_run_record_usage",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_run_finish",
"tags": [],
"reasons": {}
},
{
"tool": "zerno_memory_capture_note",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "1aeaf7ec16704d182924ec997e0c6483c3fd5012f0d004b0ec377339b406f49a",
"stats": {
"tools": 34,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 0,
"medium": 0,
"low": 1,
"info": 0
}
}
}