Cairn — 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": "cairn-mcp-server",
"source": {
"kind": "package",
"origin": "cairn-mcp-server"
},
"server": {
"name": "cairn-mcp-server"
}
},
"grade": "A",
"score": {
"score": 95,
"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": "moderate",
"label": "capability blast radius (moderate) — client exposure if the model is manipulated",
"appliedPenalty": 3
},
{
"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": "moderate",
"reasons": [
"can create, modify or delete files",
"reads sensitive or local data"
],
"tags": [
"sensitive-source",
"file-write"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (48 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-002",
"title": "Tool \"create_file\" can modify the filesystem",
"category": "permissions",
"severity": "medium",
"confidence": "strong",
"description": "Tool \"create_file\" can write, overwrite or delete files (keyword \"create_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": "create_file"
},
"data": {
"tags": [
"file-write"
]
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"create_file\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"create_file\" 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": "create_file"
},
"data": {
"tags": [
"file-write"
]
}
},
{
"ruleId": "MTC-SUP-011",
"title": "Package declares no source repository",
"category": "supply-chain",
"severity": "info",
"confidence": "strong",
"description": "\"cairn-mcp-server\" 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": "cairn-mcp-server"
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "list_dir",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"list_files\""
]
}
},
{
"tool": "get_file_tree",
"tags": [],
"reasons": {}
},
{
"tool": "read_detail",
"tags": [],
"reasons": {}
},
{
"tool": "search_files",
"tags": [],
"reasons": {}
},
{
"tool": "grep",
"tags": [],
"reasons": {}
},
{
"tool": "get_file_tags",
"tags": [],
"reasons": {}
},
{
"tool": "get_tag_tree",
"tags": [],
"reasons": {}
},
{
"tool": "find_by_meta",
"tags": [],
"reasons": {}
},
{
"tool": "list_tasks",
"tags": [],
"reasons": {}
},
{
"tool": "digest_workspace",
"tags": [],
"reasons": {}
},
{
"tool": "list_templates",
"tags": [],
"reasons": {}
},
{
"tool": "semantic_retrieve",
"tags": [],
"reasons": {}
},
{
"tool": "list_paper_projects",
"tags": [],
"reasons": {}
},
{
"tool": "preview_paper_recommendations",
"tags": [],
"reasons": {}
},
{
"tool": "create_file",
"tags": [
"file-write"
],
"reasons": {
"file-write": [
"keyword \"create_file\" in tool name"
]
}
},
{
"tool": "create_folder",
"tags": [],
"reasons": {}
},
{
"tool": "add_task",
"tags": [],
"reasons": {}
},
{
"tool": "complete_task",
"tags": [],
"reasons": {}
},
{
"tool": "next_actions",
"tags": [],
"reasons": {}
},
{
"tool": "update_task",
"tags": [],
"reasons": {}
},
{
"tool": "harvest_checklists",
"tags": [],
"reasons": {}
},
{
"tool": "who_owes",
"tags": [],
"reasons": {}
},
{
"tool": "list_bills",
"tags": [],
"reasons": {}
},
{
"tool": "who_owes_me",
"tags": [],
"reasons": {}
},
{
"tool": "list_waiting",
"tags": [],
"reasons": {}
},
{
"tool": "attention",
"tags": [],
"reasons": {}
},
{
"tool": "reminder_digest",
"tags": [],
"reasons": {}
},
{
"tool": "project_pulse",
"tags": [],
"reasons": {}
},
{
"tool": "stale_projects",
"tags": [],
"reasons": {}
},
{
"tool": "refresh_project_dashboard",
"tags": [],
"reasons": {}
},
{
"tool": "weekly_review",
"tags": [],
"reasons": {}
},
{
"tool": "set_status",
"tags": [],
"reasons": {}
},
{
"tool": "add_bill",
"tags": [],
"reasons": {}
},
{
"tool": "settle_bill",
"tags": [],
"reasons": {}
},
{
"tool": "add_person_to_bill",
"tags": [],
"reasons": {}
},
{
"tool": "add_waiting",
"tags": [],
"reasons": {}
},
{
"tool": "mark_received",
"tags": [],
"reasons": {}
},
{
"tool": "drop_waiting",
"tags": [],
"reasons": {}
},
{
"tool": "update_file_tags",
"tags": [],
"reasons": {}
},
{
"tool": "import_document",
"tags": [],
"reasons": {}
},
{
"tool": "import_folder",
"tags": [],
"reasons": {}
},
{
"tool": "reindex",
"tags": [],
"reasons": {}
},
{
"tool": "recommend_papers",
"tags": [],
"reasons": {}
},
{
"tool": "recommend_papers_all_projects",
"tags": [],
"reasons": {}
},
{
"tool": "multi_edit",
"tags": [],
"reasons": {}
},
{
"tool": "rename_item",
"tags": [],
"reasons": {}
},
{
"tool": "move_item",
"tags": [],
"reasons": {}
},
{
"tool": "delete_item",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "beb3f44df00f9c9373a9fcab01817bb74092843328c1b152dc8b7cd6c58ab584",
"stats": {
"tools": 48,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 0,
"medium": 1,
"low": 1,
"info": 1
}
}
}