Reaper — the complete, unedited output of the deterministic mcptrustchecker engine v1.9.0, scanned . Every finding, capability tag and score component below is exactly what the engine produced — no AI, no post-processing.
{
"tool": {
"name": "mcptrustchecker",
"version": "1.9.0",
"methodologyVersion": "mcptrustchecker-1.9"
},
"target": {
"id": "reaper-mcp-server",
"source": {
"kind": "package",
"origin": "reaper-mcp-server"
},
"server": {
"name": "reaper-mcp-server"
}
},
"grade": "A",
"score": {
"score": 99,
"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": "minimal",
"label": "capability blast radius (minimal) — client exposure if the model is manipulated",
"appliedPenalty": 0
},
{
"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-1.9"
},
"capability": {
"level": "minimal",
"reasons": [],
"tags": []
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (60 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-002",
"title": "Shell/command execution in packaging/dev tooling (examples/test_mcp_tools.py)",
"category": "permissions",
"severity": "low",
"confidence": "heuristic",
"description": "In a packaging/dev/install script (shipped, but not the server runtime) (`examples/test_mcp_tools.py:28`): 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": "examples/test_mcp_tools.py"
},
"evidence": "osc_mcp.sh\"] proc = subprocess.Popen(cmd, stdin=subprocess.PIPE,",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "examples/test_mcp_tools.py",
"line": 28,
"nonRuntime": true
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "create_project",
"tags": [],
"reasons": {}
},
{
"tool": "create_track",
"tags": [],
"reasons": {}
},
{
"tool": "list_tracks",
"tags": [],
"reasons": {}
},
{
"tool": "add_midi_note",
"tags": [],
"reasons": {}
},
{
"tool": "get_project_info",
"tags": [],
"reasons": {}
},
{
"tool": "save_project",
"tags": [],
"reasons": {}
},
{
"tool": "create_midi_item",
"tags": [],
"reasons": {}
},
{
"tool": "add_notes",
"tags": [],
"reasons": {}
},
{
"tool": "add_vst_plugin",
"tags": [],
"reasons": {}
},
{
"tool": "render_project",
"tags": [],
"reasons": {}
},
{
"tool": "analyze_frequency_spectrum",
"tags": [],
"reasons": {}
},
{
"tool": "detect_clipping",
"tags": [],
"reasons": {}
},
{
"tool": "analyze_dynamics",
"tags": [],
"reasons": {}
},
{
"tool": "analyze_stereo_field",
"tags": [],
"reasons": {}
},
{
"tool": "analyze_transients",
"tags": [],
"reasons": {}
},
{
"tool": "import_audio_file",
"tags": [],
"reasons": {}
},
{
"tool": "start_recording",
"tags": [],
"reasons": {}
},
{
"tool": "stop_transport",
"tags": [],
"reasons": {}
},
{
"tool": "play_project",
"tags": [],
"reasons": {}
},
{
"tool": "set_cursor_position",
"tags": [],
"reasons": {}
},
{
"tool": "edit_audio_item",
"tags": [],
"reasons": {}
},
{
"tool": "adjust_pitch",
"tags": [],
"reasons": {}
},
{
"tool": "adjust_playback_rate",
"tags": [],
"reasons": {}
},
{
"tool": "add_fx",
"tags": [],
"reasons": {}
},
{
"tool": "remove_fx",
"tags": [],
"reasons": {}
},
{
"tool": "set_fx_parameter",
"tags": [],
"reasons": {}
},
{
"tool": "get_fx_parameters",
"tags": [],
"reasons": {}
},
{
"tool": "list_track_fx",
"tags": [],
"reasons": {}
},
{
"tool": "bypass_fx",
"tags": [],
"reasons": {}
},
{
"tool": "load_fx_preset",
"tags": [],
"reasons": {}
},
{
"tool": "add_master_fx",
"tags": [],
"reasons": {}
},
{
"tool": "list_master_fx",
"tags": [],
"reasons": {}
},
{
"tool": "set_master_fx_parameter",
"tags": [],
"reasons": {}
},
{
"tool": "set_master_volume",
"tags": [],
"reasons": {}
},
{
"tool": "apply_mastering_chain",
"tags": [],
"reasons": {}
},
{
"tool": "apply_limiter",
"tags": [],
"reasons": {}
},
{
"tool": "analyze_loudness",
"tags": [],
"reasons": {}
},
{
"tool": "normalize_project",
"tags": [],
"reasons": {}
},
{
"tool": "create_chord_progression",
"tags": [],
"reasons": {}
},
{
"tool": "create_drum_pattern",
"tags": [],
"reasons": {}
},
{
"tool": "add_volume_automation",
"tags": [],
"reasons": {}
},
{
"tool": "add_pan_automation",
"tags": [],
"reasons": {}
},
{
"tool": "create_send",
"tags": [],
"reasons": {}
},
{
"tool": "list_sends",
"tags": [],
"reasons": {}
},
{
"tool": "remove_send",
"tags": [],
"reasons": {}
},
{
"tool": "set_send_volume",
"tags": [],
"reasons": {}
},
{
"tool": "create_bus",
"tags": [],
"reasons": {}
},
{
"tool": "load_project",
"tags": [],
"reasons": {}
},
{
"tool": "set_tempo",
"tags": [],
"reasons": {}
},
{
"tool": "set_time_signature",
"tags": [],
"reasons": {}
},
{
"tool": "render_time_selection",
"tags": [],
"reasons": {}
},
{
"tool": "render_stems",
"tags": [],
"reasons": {}
},
{
"tool": "delete_track",
"tags": [],
"reasons": {}
},
{
"tool": "rename_track",
"tags": [],
"reasons": {}
},
{
"tool": "set_track_volume",
"tags": [],
"reasons": {}
},
{
"tool": "set_track_pan",
"tags": [],
"reasons": {}
},
{
"tool": "set_track_mute",
"tags": [],
"reasons": {}
},
{
"tool": "set_track_solo",
"tags": [],
"reasons": {}
},
{
"tool": "get_track_info",
"tags": [],
"reasons": {}
},
{
"tool": "set_track_color",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "3fbdf1c47cb31df830a0f95361c355bbf6774d2f4bedb607647243662a227b74",
"stats": {
"tools": 60,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 0,
"medium": 0,
"low": 1,
"info": 0
}
}
}