Callrail — the complete, unedited output of the deterministic mcptrustchecker engine v1.8.0, scanned . Every finding, capability tag and score component below is exactly what the engine produced — no AI, no post-processing.
{
"tool": {
"name": "mcptrustchecker",
"version": "1.8.0",
"methodologyVersion": "mcptrustchecker-1.8"
},
"target": {
"id": "callrail-mcp",
"source": {
"kind": "package",
"origin": "callrail-mcp"
},
"server": {
"name": "callrail-mcp"
}
},
"grade": "A",
"score": {
"score": 96,
"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": "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-1.8"
},
"capability": {
"level": "moderate",
"reasons": [
"ingests untrusted external content (a prompt-injection entry point)",
"can send data / act on an external service"
],
"tags": [
"untrusted-input",
"external-sink"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (59 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 ([get_call_recording]) co-exist with external-action tools ([delete_notification, update_sms_thread]). 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": "get_call_recording → delete_notification"
},
"evidence": "untrusted [get_call_recording] → sinks [delete_notification, update_sms_thread]",
"owasp": "LLM06:2025 Excessive Agency",
"references": [],
"data": {
"untrusted": [
"get_call_recording"
],
"sinks": [
"delete_notification",
"update_sms_thread"
]
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "medium",
"confidence": "strong",
"untrustedInput": [
"get_call_recording"
],
"sensitiveSource": [],
"externalSink": [
"delete_notification",
"update_sms_thread"
],
"selfContained": false,
"description": "Untrusted input can drive an external action even though no sensitive source is exposed."
}
],
"capabilities": [
{
"tool": "list_accounts",
"tags": [],
"reasons": {}
},
{
"tool": "list_companies",
"tags": [],
"reasons": {}
},
{
"tool": "list_trackers",
"tags": [],
"reasons": {}
},
{
"tool": "get_tracker",
"tags": [],
"reasons": {}
},
{
"tool": "create_tracker",
"tags": [],
"reasons": {}
},
{
"tool": "update_tracker",
"tags": [],
"reasons": {}
},
{
"tool": "delete_tracker",
"tags": [],
"reasons": {}
},
{
"tool": "list_calls",
"tags": [],
"reasons": {}
},
{
"tool": "get_call",
"tags": [],
"reasons": {}
},
{
"tool": "call_summary",
"tags": [],
"reasons": {}
},
{
"tool": "list_form_submissions",
"tags": [],
"reasons": {}
},
{
"tool": "list_text_messages",
"tags": [],
"reasons": {}
},
{
"tool": "list_users",
"tags": [],
"reasons": {}
},
{
"tool": "get_call_recording",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "get_call_transcript",
"tags": [],
"reasons": {}
},
{
"tool": "search_calls_by_number",
"tags": [],
"reasons": {}
},
{
"tool": "update_call",
"tags": [],
"reasons": {}
},
{
"tool": "add_call_tags",
"tags": [],
"reasons": {}
},
{
"tool": "remove_call_tags",
"tags": [],
"reasons": {}
},
{
"tool": "update_form_submission",
"tags": [],
"reasons": {}
},
{
"tool": "list_tags",
"tags": [],
"reasons": {}
},
{
"tool": "create_tag",
"tags": [],
"reasons": {}
},
{
"tool": "update_tag",
"tags": [],
"reasons": {}
},
{
"tool": "delete_tag",
"tags": [],
"reasons": {}
},
{
"tool": "usage_summary",
"tags": [],
"reasons": {}
},
{
"tool": "call_eligibility_check",
"tags": [],
"reasons": {}
},
{
"tool": "compare_periods",
"tags": [],
"reasons": {}
},
{
"tool": "bulk_update_calls",
"tags": [],
"reasons": {}
},
{
"tool": "spam_detector",
"tags": [],
"reasons": {}
},
{
"tool": "get_company",
"tags": [],
"reasons": {}
},
{
"tool": "create_company",
"tags": [],
"reasons": {}
},
{
"tool": "update_company",
"tags": [],
"reasons": {}
},
{
"tool": "delete_company",
"tags": [],
"reasons": {}
},
{
"tool": "get_user",
"tags": [],
"reasons": {}
},
{
"tool": "create_user",
"tags": [],
"reasons": {}
},
{
"tool": "update_user",
"tags": [],
"reasons": {}
},
{
"tool": "delete_user",
"tags": [],
"reasons": {}
},
{
"tool": "get_form_submission",
"tags": [],
"reasons": {}
},
{
"tool": "get_text_message",
"tags": [],
"reasons": {}
},
{
"tool": "list_webhooks",
"tags": [],
"reasons": {}
},
{
"tool": "get_webhook",
"tags": [],
"reasons": {}
},
{
"tool": "get_tag",
"tags": [],
"reasons": {}
},
{
"tool": "list_integrations",
"tags": [],
"reasons": {}
},
{
"tool": "get_integration",
"tags": [],
"reasons": {}
},
{
"tool": "create_form_submission",
"tags": [],
"reasons": {}
},
{
"tool": "create_outbound_call",
"tags": [],
"reasons": {}
},
{
"tool": "create_notification",
"tags": [],
"reasons": {}
},
{
"tool": "update_notification",
"tags": [],
"reasons": {}
},
{
"tool": "delete_notification",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"send_email\""
]
}
},
{
"tool": "list_notifications",
"tags": [],
"reasons": {}
},
{
"tool": "list_leads",
"tags": [],
"reasons": {}
},
{
"tool": "get_lead_timeline",
"tags": [],
"reasons": {}
},
{
"tool": "list_sms_threads",
"tags": [],
"reasons": {}
},
{
"tool": "get_sms_thread",
"tags": [],
"reasons": {}
},
{
"tool": "update_sms_thread",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"sms\""
]
}
},
{
"tool": "call_stats",
"tags": [],
"reasons": {}
},
{
"tool": "call_timeseries",
"tags": [],
"reasons": {}
},
{
"tool": "form_stats",
"tags": [],
"reasons": {}
},
{
"tool": "get_call_page_views",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "f0c3f226565b4a30941b4ca5c5ce2d2cd00583c68ba22f7f173561fbf19c0fe1",
"stats": {
"tools": 59,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 0,
"medium": 1,
"low": 0,
"info": 0
}
}
}