Simplenote — 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": "simplenote-mcp-server",
"source": {
"kind": "package",
"origin": "simplenote-mcp-server"
},
"server": {
"name": "simplenote-mcp-server"
}
},
"grade": "B",
"score": {
"score": 87,
"threatScore": 98,
"grade": "B",
"band": "B",
"categorySubtotals": {
"injection": 0,
"exfiltration": 0,
"permissions": 0,
"supply-chain": 2.1,
"network": 0,
"hygiene": 0
},
"vector": [
{
"kind": "threat",
"ruleId": "MTC-SUP-011",
"category": "supply-chain",
"severity": "low",
"confidence": "strong",
"rawWeight": 3,
"confidenceMult": 0.7,
"diminishingFactor": 1,
"appliedPenalty": 2.1
},
{
"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": "none",
"label": "publisher verification (unlocatable) — no provenance and no public repository to inspect",
"appliedPenalty": 5
},
{
"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": [
"reads sensitive or local data",
"has a read → egress path (a data-exfiltration surface)",
"can execute shell commands or code"
],
"tags": [
"sensitive-source",
"code-exec"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (30 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-SRC-006",
"title": "Reads a sensitive credential path or dumps the environment (simplenote_mcp/scripts/live_test_redesign.py)",
"category": "exfiltration",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`simplenote_mcp/scripts/live_test_redesign.py:59`): Reading private keys / cloud credentials, or serializing the whole environment, is a sensitive-data source that becomes exfiltration when combined with any egress. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.",
"remediation": "Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.",
"location": {
"kind": "server",
"name": "simplenote_mcp/scripts/live_test_redesign.py"
},
"evidence": "dict(os.environ)",
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"data": {
"rule": "MTC-SRC-006",
"file": "simplenote_mcp/scripts/live_test_redesign.py",
"line": 59
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (simplenote_mcp/server/keychain.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`simplenote_mcp/server/keychain.py:70`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.",
"remediation": "Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.",
"location": {
"kind": "server",
"name": "simplenote_mcp/server/keychain.py"
},
"evidence": "subprocess.run(",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "simplenote_mcp/server/keychain.py",
"line": 70
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in packaging/dev tooling (simplenote_mcp/scripts/diagnose_api.py)",
"category": "permissions",
"severity": "low",
"confidence": "heuristic",
"description": "In a packaging/dev/install script (shipped, but not the server runtime) (`simplenote_mcp/scripts/diagnose_api.py:424`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.",
"remediation": "Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.",
"location": {
"kind": "server",
"name": "simplenote_mcp/scripts/diagnose_api.py"
},
"evidence": "subprocess.check_output(",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "simplenote_mcp/scripts/diagnose_api.py",
"line": 424
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in packaging/dev tooling (simplenote_mcp/scripts/generate_test_coverage.py)",
"category": "permissions",
"severity": "low",
"confidence": "heuristic",
"description": "In a packaging/dev/install script (shipped, but not the server runtime) (`simplenote_mcp/scripts/generate_test_coverage.py:135`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.",
"remediation": "Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.",
"location": {
"kind": "server",
"name": "simplenote_mcp/scripts/generate_test_coverage.py"
},
"evidence": "subprocess.run(",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "simplenote_mcp/scripts/generate_test_coverage.py",
"line": 135
}
},
{
"ruleId": "MTC-SUP-011",
"title": "Package has no source repository",
"category": "supply-chain",
"severity": "low",
"confidence": "strong",
"description": "\"simplenote-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": "simplenote-mcp-server"
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "list_notes",
"tags": [],
"reasons": {}
},
{
"tool": "search_notes",
"tags": [],
"reasons": {}
},
{
"tool": "get_note",
"tags": [],
"reasons": {}
},
{
"tool": "list_tags",
"tags": [],
"reasons": {}
},
{
"tool": "get_note_versions",
"tags": [],
"reasons": {}
},
{
"tool": "find_untagged_notes",
"tags": [],
"reasons": {}
},
{
"tool": "export_notes",
"tags": [],
"reasons": {}
},
{
"tool": "get_server_info",
"tags": [],
"reasons": {}
},
{
"tool": "vault_status",
"tags": [],
"reasons": {}
},
{
"tool": "create_note",
"tags": [],
"reasons": {}
},
{
"tool": "update_note",
"tags": [],
"reasons": {}
},
{
"tool": "delete_note",
"tags": [],
"reasons": {}
},
{
"tool": "add_tags",
"tags": [],
"reasons": {}
},
{
"tool": "remove_tags",
"tags": [],
"reasons": {}
},
{
"tool": "replace_tags",
"tags": [],
"reasons": {}
},
{
"tool": "add_text",
"tags": [],
"reasons": {}
},
{
"tool": "replace_section",
"tags": [],
"reasons": {}
},
{
"tool": "restore_version",
"tags": [],
"reasons": {}
},
{
"tool": "append_to_daily_note",
"tags": [],
"reasons": {}
},
{
"tool": "get_or_create_note",
"tags": [],
"reasons": {}
},
{
"tool": "rename_tag",
"tags": [],
"reasons": {}
},
{
"tool": "bulk_tag",
"tags": [],
"reasons": {}
},
{
"tool": "restore_note",
"tags": [],
"reasons": {}
},
{
"tool": "publish_note",
"tags": [],
"reasons": {}
},
{
"tool": "unpublish_note",
"tags": [],
"reasons": {}
},
{
"tool": "find_and_merge_duplicates",
"tags": [],
"reasons": {}
},
{
"tool": "permanent_delete_note",
"tags": [],
"reasons": {}
},
{
"tool": "empty_trash",
"tags": [],
"reasons": {}
},
{
"tool": "encrypt_note",
"tags": [],
"reasons": {}
},
{
"tool": "decrypt_note",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "f3eaae8c6c938951a469aa6c495c0c6cec230f35b5e79ab2418e8958f63947ab",
"stats": {
"tools": 30,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 2,
"medium": 0,
"low": 3,
"info": 0
}
}
}