Mailchimp — 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": "mcp-mailchimp",
"source": {
"kind": "package",
"origin": "mcp-mailchimp"
},
"server": {
"name": "mcp-mailchimp"
}
},
"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-1.8"
},
"capability": {
"level": "high",
"reasons": [
"can send data / act on an external service",
"reads sensitive or local data",
"has a read → egress path (a data-exfiltration surface)"
],
"tags": [
"external-sink",
"sensitive-source"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (71 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 ([list_files]) and tools that can send data out ([create_webhook, delete_webhook, upload_file]) 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": "list_files → create_webhook"
},
"evidence": "sources [list_files] → sinks [create_webhook, delete_webhook, upload_file]",
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"references": [],
"data": {
"sources": [
"list_files"
],
"sinks": [
"create_webhook",
"delete_webhook",
"upload_file"
]
}
},
{
"ruleId": "MTC-SUP-012",
"title": "Package has no license",
"category": "hygiene",
"severity": "info",
"confidence": "strong",
"description": "\"mcp-mailchimp\" has no declared license. This is a legal/reuse concern, not a security finding.",
"location": {
"kind": "package",
"name": "mcp-mailchimp"
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "high",
"confidence": "strong",
"untrustedInput": [],
"sensitiveSource": [
"list_files"
],
"externalSink": [
"create_webhook",
"delete_webhook",
"upload_file"
],
"selfContained": false,
"path": [
"list_files",
"create_webhook"
],
"pathWired": false,
"description": "A sensitive-source → external-sink chain exists: list_files → create_webhook."
}
],
"capabilities": [
{
"tool": "ping",
"tags": [],
"reasons": {}
},
{
"tool": "list_campaigns",
"tags": [],
"reasons": {}
},
{
"tool": "get_campaign",
"tags": [],
"reasons": {}
},
{
"tool": "create_campaign",
"tags": [],
"reasons": {}
},
{
"tool": "update_campaign",
"tags": [],
"reasons": {}
},
{
"tool": "send_campaign",
"tags": [],
"reasons": {}
},
{
"tool": "schedule_campaign",
"tags": [],
"reasons": {}
},
{
"tool": "replicate_campaign",
"tags": [],
"reasons": {}
},
{
"tool": "send_test_email",
"tags": [],
"reasons": {}
},
{
"tool": "get_campaign_content",
"tags": [],
"reasons": {}
},
{
"tool": "set_campaign_content",
"tags": [],
"reasons": {}
},
{
"tool": "get_campaign_report",
"tags": [],
"reasons": {}
},
{
"tool": "get_click_report",
"tags": [],
"reasons": {}
},
{
"tool": "get_open_report",
"tags": [],
"reasons": {}
},
{
"tool": "list_audiences",
"tags": [],
"reasons": {}
},
{
"tool": "get_audience",
"tags": [],
"reasons": {}
},
{
"tool": "create_audience",
"tags": [],
"reasons": {}
},
{
"tool": "list_members",
"tags": [],
"reasons": {}
},
{
"tool": "get_member",
"tags": [],
"reasons": {}
},
{
"tool": "add_or_update_member",
"tags": [],
"reasons": {}
},
{
"tool": "archive_member",
"tags": [],
"reasons": {}
},
{
"tool": "search_members",
"tags": [],
"reasons": {}
},
{
"tool": "get_member_activity",
"tags": [],
"reasons": {}
},
{
"tool": "list_tags",
"tags": [],
"reasons": {}
},
{
"tool": "manage_member_tags",
"tags": [],
"reasons": {}
},
{
"tool": "list_segments",
"tags": [],
"reasons": {}
},
{
"tool": "get_segment_members",
"tags": [],
"reasons": {}
},
{
"tool": "create_segment",
"tags": [],
"reasons": {}
},
{
"tool": "list_templates",
"tags": [],
"reasons": {}
},
{
"tool": "get_template",
"tags": [],
"reasons": {}
},
{
"tool": "list_automations",
"tags": [],
"reasons": {}
},
{
"tool": "pause_automation",
"tags": [],
"reasons": {}
},
{
"tool": "start_automation",
"tags": [],
"reasons": {}
},
{
"tool": "get_automation",
"tags": [],
"reasons": {}
},
{
"tool": "list_automation_emails",
"tags": [],
"reasons": {}
},
{
"tool": "delete_campaign",
"tags": [],
"reasons": {}
},
{
"tool": "unschedule_campaign",
"tags": [],
"reasons": {}
},
{
"tool": "cancel_campaign",
"tags": [],
"reasons": {}
},
{
"tool": "update_audience",
"tags": [],
"reasons": {}
},
{
"tool": "batch_subscribe_members",
"tags": [],
"reasons": {}
},
{
"tool": "delete_member_permanent",
"tags": [],
"reasons": {}
},
{
"tool": "list_merge_fields",
"tags": [],
"reasons": {}
},
{
"tool": "create_merge_field",
"tags": [],
"reasons": {}
},
{
"tool": "list_interest_categories",
"tags": [],
"reasons": {}
},
{
"tool": "list_interests",
"tags": [],
"reasons": {}
},
{
"tool": "create_template",
"tags": [],
"reasons": {}
},
{
"tool": "delete_template",
"tags": [],
"reasons": {}
},
{
"tool": "update_segment",
"tags": [],
"reasons": {}
},
{
"tool": "delete_segment",
"tags": [],
"reasons": {}
},
{
"tool": "list_webhooks",
"tags": [],
"reasons": {}
},
{
"tool": "create_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "delete_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "get_unsubscribe_report",
"tags": [],
"reasons": {}
},
{
"tool": "get_sent_to_report",
"tags": [],
"reasons": {}
},
{
"tool": "list_landing_pages",
"tags": [],
"reasons": {}
},
{
"tool": "get_landing_page",
"tags": [],
"reasons": {}
},
{
"tool": "create_batch_operation",
"tags": [],
"reasons": {}
},
{
"tool": "list_ecommerce_stores",
"tags": [],
"reasons": {}
},
{
"tool": "list_store_products",
"tags": [],
"reasons": {}
},
{
"tool": "list_store_orders",
"tags": [],
"reasons": {}
},
{
"tool": "get_ecommerce_customer",
"tags": [],
"reasons": {}
},
{
"tool": "list_store_carts",
"tags": [],
"reasons": {}
},
{
"tool": "list_store_promo_codes",
"tags": [],
"reasons": {}
},
{
"tool": "get_audience_growth",
"tags": [],
"reasons": {}
},
{
"tool": "get_audience_locations",
"tags": [],
"reasons": {}
},
{
"tool": "get_email_client_stats",
"tags": [],
"reasons": {}
},
{
"tool": "get_ab_test_results",
"tags": [],
"reasons": {}
},
{
"tool": "list_member_notes",
"tags": [],
"reasons": {}
},
{
"tool": "add_member_note",
"tags": [],
"reasons": {}
},
{
"tool": "list_files",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"list_files\""
]
}
},
{
"tool": "upload_file",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"upload_file\""
]
}
}
],
"surfaceDigest": "7a1a2f7dbd52a1613258102dbc147e934b02fad74fb81c5dcdee565b9f9221a3",
"stats": {
"tools": 71,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 1,
"medium": 0,
"low": 0,
"info": 1
}
}
}