Crafty — 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": "crafty-mcp",
"source": {
"kind": "package",
"origin": "crafty-mcp"
},
"server": {
"name": "crafty-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 create, modify or delete files",
"reads sensitive or local data",
"has a read → egress path (a data-exfiltration surface)"
],
"tags": [
"sensitive-source",
"file-write",
"external-sink"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (56 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 ([server_get_logs, server_list_files]) and tools that can send data out ([server_get_webhook, server_create_webhook, server_update_webhook, server_delete_webhook, server_test_webhook]) 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": "server_get_logs → server_get_webhook"
},
"evidence": "sources [server_get_logs, server_list_files] → sinks [server_get_webhook, server_create_webhook, server_update_webhook, server_delete_webhook, server_test_webho",
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"references": [],
"data": {
"sources": [
"server_get_logs",
"server_list_files"
],
"sinks": [
"server_get_webhook",
"server_create_webhook",
"server_update_webhook",
"server_delete_webhook",
"server_test_webhook"
]
}
},
{
"ruleId": "MTC-CAP-002",
"title": "Tool \"server_delete_file\" can modify the filesystem",
"category": "permissions",
"severity": "medium",
"confidence": "strong",
"description": "Tool \"server_delete_file\" can write, overwrite or delete files (keyword \"delete_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": "server_delete_file"
},
"data": {
"tags": [
"file-write"
]
}
},
{
"ruleId": "MTC-CAP-002",
"title": "Tool \"server_create_file\" can modify the filesystem",
"category": "permissions",
"severity": "medium",
"confidence": "strong",
"description": "Tool \"server_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": "server_create_file"
},
"data": {
"tags": [
"file-write"
]
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"server_delete_file\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"server_delete_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": "server_delete_file"
},
"data": {
"tags": [
"file-write"
]
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"server_create_file\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"server_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": "server_create_file"
},
"data": {
"tags": [
"file-write"
]
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "high",
"confidence": "strong",
"untrustedInput": [],
"sensitiveSource": [
"server_get_logs",
"server_list_files"
],
"externalSink": [
"server_get_webhook",
"server_create_webhook",
"server_update_webhook",
"server_delete_webhook",
"server_test_webhook"
],
"selfContained": false,
"path": [
"server_get_logs",
"server_create_webhook"
],
"pathWired": false,
"description": "A sensitive-source → external-sink chain exists: server_get_logs → server_create_webhook."
}
],
"capabilities": [
{
"tool": "crafty_login",
"tags": [],
"reasons": {}
},
{
"tool": "crafty_api_info",
"tags": [],
"reasons": {}
},
{
"tool": "crafty_list_schemas",
"tags": [],
"reasons": {}
},
{
"tool": "crafty_get_schema",
"tags": [],
"reasons": {}
},
{
"tool": "crafty_get_stats",
"tags": [],
"reasons": {}
},
{
"tool": "crafty_get_config",
"tags": [],
"reasons": {}
},
{
"tool": "crafty_update_config",
"tags": [],
"reasons": {}
},
{
"tool": "role_list",
"tags": [],
"reasons": {}
},
{
"tool": "role_get",
"tags": [],
"reasons": {}
},
{
"tool": "role_create",
"tags": [],
"reasons": {}
},
{
"tool": "role_update",
"tags": [],
"reasons": {}
},
{
"tool": "role_delete",
"tags": [],
"reasons": {}
},
{
"tool": "server_list_backups",
"tags": [],
"reasons": {}
},
{
"tool": "server_get_backup_config",
"tags": [],
"reasons": {}
},
{
"tool": "server_update_backup_config",
"tags": [],
"reasons": {}
},
{
"tool": "server_restore_backup",
"tags": [],
"reasons": {}
},
{
"tool": "server_delete_backup",
"tags": [],
"reasons": {}
},
{
"tool": "server_send_command",
"tags": [],
"reasons": {}
},
{
"tool": "server_get_logs",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"get_logs\""
]
}
},
{
"tool": "server_get_stats",
"tags": [],
"reasons": {}
},
{
"tool": "server_get_history",
"tags": [],
"reasons": {}
},
{
"tool": "server_list_files",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"list_files\""
]
}
},
{
"tool": "server_get_file",
"tags": [],
"reasons": {}
},
{
"tool": "server_update_file",
"tags": [],
"reasons": {}
},
{
"tool": "server_delete_file",
"tags": [
"file-write"
],
"reasons": {
"file-write": [
"keyword \"delete_file\" in tool name"
]
}
},
{
"tool": "server_create_file",
"tags": [
"file-write"
],
"reasons": {
"file-write": [
"keyword \"create_file\" in tool name"
]
}
},
{
"tool": "server_create_directory",
"tags": [],
"reasons": {}
},
{
"tool": "server_rename_file",
"tags": [],
"reasons": {}
},
{
"tool": "server_decompress_file",
"tags": [],
"reasons": {}
},
{
"tool": "server_list_tasks",
"tags": [],
"reasons": {}
},
{
"tool": "server_get_task",
"tags": [],
"reasons": {}
},
{
"tool": "server_create_task",
"tags": [],
"reasons": {}
},
{
"tool": "server_update_task",
"tags": [],
"reasons": {}
},
{
"tool": "server_delete_task",
"tags": [],
"reasons": {}
},
{
"tool": "server_run_task",
"tags": [],
"reasons": {}
},
{
"tool": "server_list_webhooks",
"tags": [],
"reasons": {}
},
{
"tool": "server_get_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "server_create_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "server_update_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "server_delete_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "server_test_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "server_list",
"tags": [],
"reasons": {}
},
{
"tool": "server_get",
"tags": [],
"reasons": {}
},
{
"tool": "server_create",
"tags": [],
"reasons": {}
},
{
"tool": "server_update",
"tags": [],
"reasons": {}
},
{
"tool": "server_delete",
"tags": [],
"reasons": {}
},
{
"tool": "user_list",
"tags": [],
"reasons": {}
},
{
"tool": "user_get",
"tags": [],
"reasons": {}
},
{
"tool": "user_create",
"tags": [],
"reasons": {}
},
{
"tool": "user_update",
"tags": [],
"reasons": {}
},
{
"tool": "user_delete",
"tags": [],
"reasons": {}
},
{
"tool": "user_get_permissions",
"tags": [],
"reasons": {}
},
{
"tool": "user_update_permissions",
"tags": [],
"reasons": {}
},
{
"tool": "user_get_api_keys",
"tags": [],
"reasons": {}
},
{
"tool": "user_create_api_key",
"tags": [],
"reasons": {}
},
{
"tool": "user_delete_api_key",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "2673aad71c6434292272f6615a1babd242891eeed8cd6acf2a032f901c6c4369",
"stats": {
"tools": 56,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 1,
"medium": 2,
"low": 2,
"info": 0
}
}
}