Pylon — 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": "@customer-support-success/pylon-mcp-server",
"source": {
"kind": "package",
"origin": "@customer-support-success/pylon-mcp-server"
},
"server": {
"name": "@customer-support-success/pylon-mcp-server"
}
},
"grade": "A",
"score": {
"score": 97,
"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": "source",
"label": "publisher verification (provenance) — cryptographic build provenance ties the artifact to its source",
"appliedPenalty": 0
},
{
"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": [
"ingests untrusted external content (a prompt-injection entry point)",
"can send data / act on an external service",
"can create, modify or delete files"
],
"tags": [
"external-sink",
"untrusted-input",
"file-write"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (38 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-005",
"title": "Untrusted input can drive an external action",
"category": "exfiltration",
"severity": "medium",
"confidence": "strong",
"description": "Untrusted-input tools ([pylon_find_similar_issues_global, pylon_get_attachment]) co-exist with external-action tools ([pylon_create_issue]). 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": "pylon_find_similar_issues_global → pylon_create_issue"
},
"evidence": "untrusted [pylon_find_similar_issues_global, pylon_get_attachment] → sinks [pylon_create_issue]",
"owasp": "LLM06:2025 Excessive Agency",
"references": [],
"data": {
"untrusted": [
"pylon_find_similar_issues_global",
"pylon_get_attachment"
],
"sinks": [
"pylon_create_issue"
]
}
},
{
"ruleId": "MTC-CAP-002",
"title": "Tool \"pylon_unlink_external_issue\" can modify the filesystem",
"category": "permissions",
"severity": "medium",
"confidence": "strong",
"description": "Tool \"pylon_unlink_external_issue\" can write, overwrite or delete files (keyword \"unlink\" 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": "pylon_unlink_external_issue"
},
"data": {
"tags": [
"file-write"
]
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"pylon_unlink_external_issue\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"pylon_unlink_external_issue\" 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": "pylon_unlink_external_issue"
},
"data": {
"tags": [
"file-write"
]
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "medium",
"confidence": "strong",
"untrustedInput": [
"pylon_find_similar_issues_global",
"pylon_get_attachment"
],
"sensitiveSource": [],
"externalSink": [
"pylon_create_issue"
],
"selfContained": false,
"description": "Untrusted input can drive an external action even though no sensitive source is exposed."
}
],
"capabilities": [
{
"tool": "pylon_get_me",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_get_users",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_search_users",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_get_contacts",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_create_contact",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_search_contacts",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_get_issues",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_create_issue",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"create_issue\""
]
}
},
{
"tool": "pylon_get_issue",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_update_issue",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_add_tags",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_remove_tags",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_search_issues",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_search_issues_by_status",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_find_similar_issues_for_requestor",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_find_similar_issues_for_account",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_find_similar_issues_global",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"read_issue\""
]
}
},
{
"tool": "pylon_snooze_issue",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_get_issue_with_messages",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_get_issue_messages",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_get_knowledge_bases",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_create_knowledge_base_article",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_get_teams",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_get_team",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_create_team",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_get_accounts",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_get_account",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_get_tags",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_create_tag",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_get_ticket_forms",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_get_attachment",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"download\""
]
}
},
{
"tool": "pylon_create_attachment_from_url",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_link_external_issue",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_unlink_external_issue",
"tags": [
"file-write"
],
"reasons": {
"file-write": [
"keyword \"unlink\" in tool name"
]
}
},
{
"tool": "pylon_get_issue_followers",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_add_issue_followers",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_remove_issue_followers",
"tags": [],
"reasons": {}
},
{
"tool": "pylon_delete_issue",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "bd64d971a6c62d3955be93aaa4966425984b97635cfdfce7988c2dd8f9f2fd39",
"stats": {
"tools": 38,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 0,
"medium": 2,
"low": 1,
"info": 0
}
}
}