Stella — 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": "stella-mcp",
"source": {
"kind": "package",
"origin": "stella-mcp"
},
"server": {
"name": "stella-mcp"
}
},
"grade": "A",
"score": {
"score": 98,
"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": "none",
"label": "publisher verification (unlinked) — no provenance/repo link, but the shipped source was fully read",
"appliedPenalty": 2
},
{
"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": "minimal",
"reasons": [],
"tags": []
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (44 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-005",
"title": "Dynamic module load from a non-literal (stella_mcp/server.py)",
"category": "permissions",
"severity": "medium",
"confidence": "heuristic",
"description": "In the server's implementation (`stella_mcp/server.py:293`): Loading a module chosen at runtime (from a variable) can pull in and run attacker-influenced code paths. 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": "stella_mcp/server.py"
},
"evidence": "\") _workspace_store.require(supplied) return supplied async def call_tool( name: str, arguments: dict[",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-005",
"file": "stella_mcp/server.py",
"line": 293,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-005",
"title": "Dynamic module load from a non-literal (stella_mcp/session_store.py)",
"category": "permissions",
"severity": "medium",
"confidence": "heuristic",
"description": "In the server's implementation (`stella_mcp/session_store.py:131`): Loading a module chosen at runtime (from a variable) can pull in and run attacker-influenced code paths. 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": "stella_mcp/session_store.py"
},
"evidence": "revoked\") self.require(workspace_id) del self._workspaces[workspace_id] self._remember_tombston",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-005",
"file": "stella_mcp/session_store.py",
"line": 131,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SUP-012",
"title": "Package has no license",
"category": "hygiene",
"severity": "info",
"confidence": "strong",
"description": "\"stella-mcp\" has no declared license. This is a legal/reuse concern, not a security finding.",
"location": {
"kind": "package",
"name": "stella-mcp"
}
},
{
"ruleId": "MTC-SUP-011",
"title": "Package declares no source repository",
"category": "supply-chain",
"severity": "info",
"confidence": "strong",
"description": "\"stella-mcp\" 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": "stella-mcp"
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "create_workspace",
"tags": [],
"reasons": {}
},
{
"tool": "revoke_workspace",
"tags": [],
"reasons": {}
},
{
"tool": "create_model",
"tags": [],
"reasons": {}
},
{
"tool": "build_model",
"tags": [],
"reasons": {}
},
{
"tool": "add_variables",
"tags": [],
"reasons": {}
},
{
"tool": "set_sim_specs",
"tags": [],
"reasons": {}
},
{
"tool": "add_stock",
"tags": [],
"reasons": {}
},
{
"tool": "update_stock",
"tags": [],
"reasons": {}
},
{
"tool": "add_flow",
"tags": [],
"reasons": {}
},
{
"tool": "update_flow",
"tags": [],
"reasons": {}
},
{
"tool": "add_aux",
"tags": [],
"reasons": {}
},
{
"tool": "update_aux",
"tags": [],
"reasons": {}
},
{
"tool": "add_connector",
"tags": [],
"reasons": {}
},
{
"tool": "sync_connectors_from_equations",
"tags": [],
"reasons": {}
},
{
"tool": "set_connector_routing",
"tags": [],
"reasons": {}
},
{
"tool": "rename_variable",
"tags": [],
"reasons": {}
},
{
"tool": "delete_variable",
"tags": [],
"reasons": {}
},
{
"tool": "list_models",
"tags": [],
"reasons": {}
},
{
"tool": "delete_model",
"tags": [],
"reasons": {}
},
{
"tool": "inspect_model",
"tags": [],
"reasons": {}
},
{
"tool": "list_modules",
"tags": [],
"reasons": {}
},
{
"tool": "list_connectors",
"tags": [],
"reasons": {}
},
{
"tool": "validate_model",
"tags": [],
"reasons": {}
},
{
"tool": "list_variables",
"tags": [],
"reasons": {}
},
{
"tool": "get_model_xml",
"tags": [],
"reasons": {}
},
{
"tool": "save_model",
"tags": [],
"reasons": {}
},
{
"tool": "render_diagram",
"tags": [],
"reasons": {}
},
{
"tool": "read_model",
"tags": [],
"reasons": {}
},
{
"tool": "list_templates",
"tags": [],
"reasons": {}
},
{
"tool": "get_template_info",
"tags": [],
"reasons": {}
},
{
"tool": "load_template",
"tags": [],
"reasons": {}
},
{
"tool": "save_as_template",
"tags": [],
"reasons": {}
},
{
"tool": "create_module",
"tags": [],
"reasons": {}
},
{
"tool": "add_to_module",
"tags": [],
"reasons": {}
},
{
"tool": "remove_from_module",
"tags": [],
"reasons": {}
},
{
"tool": "rename_module",
"tags": [],
"reasons": {}
},
{
"tool": "delete_module",
"tags": [],
"reasons": {}
},
{
"tool": "set_module_view",
"tags": [],
"reasons": {}
},
{
"tool": "set_module_style",
"tags": [],
"reasons": {}
},
{
"tool": "auto_place_module_boxes",
"tags": [],
"reasons": {}
},
{
"tool": "simulate",
"tags": [],
"reasons": {}
},
{
"tool": "compare_scenarios",
"tags": [],
"reasons": {}
},
{
"tool": "sensitivity_analysis",
"tags": [],
"reasons": {}
},
{
"tool": "calibrate",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "ad06f9b3122d1df84a0d47b49d9687912ce958924129399eb39e0d1b2a03cfa1",
"stats": {
"tools": 44,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 0,
"medium": 2,
"low": 0,
"info": 2
}
}
}