Chess Com Lichess Org — 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": "chess-com-lichess-org-mcp",
"source": {
"kind": "package",
"origin": "chess-com-lichess-org-mcp"
},
"server": {
"name": "chess-com-lichess-org-mcp"
}
},
"grade": "A",
"score": {
"score": 94,
"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": "source",
"label": "publisher verification (provenance) — cryptographic build provenance ties the artifact to its source",
"appliedPenalty": 0
},
{
"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": "high",
"reasons": [
"ingests untrusted external content (a prompt-injection entry point)",
"can send data / act on an external service",
"can execute shell commands or code"
],
"tags": [
"untrusted-input",
"code-exec",
"external-sink"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (84 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-CAP-001",
"title": "Tool \"lichess_get_cloud_eval\" exposes command/code execution",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "Tool \"lichess_get_cloud_eval\" appears to run shell commands or evaluate code (keyword \"eval\" in tool name). Arbitrary execution driven by model input is one of the most dangerous MCP capabilities; combined with any untrusted input it becomes RCE.",
"remediation": "Sandbox execution, allowlist commands/arguments, and never pass model output to a shell unescaped.",
"location": {
"kind": "tool",
"name": "lichess_get_cloud_eval"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-FLOW-005",
"title": "Untrusted input can drive an external action",
"category": "exfiltration",
"severity": "medium",
"confidence": "strong",
"description": "Untrusted-input tools ([get_game_archives, lichess_get_users]) co-exist with external-action tools ([lichess_get_cloud_eval, lichess_get_user_studies]). 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_game_archives → lichess_get_cloud_eval"
},
"evidence": "untrusted [get_game_archives, lichess_get_users] → sinks [lichess_get_cloud_eval, lichess_get_user_studies]",
"owasp": "LLM06:2025 Excessive Agency",
"references": [],
"data": {
"untrusted": [
"get_game_archives",
"lichess_get_users"
],
"sinks": [
"lichess_get_cloud_eval",
"lichess_get_user_studies"
]
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"lichess_get_cloud_eval\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"lichess_get_cloud_eval\" can mutate/egress but declares no destructiveHint. Clients that don't default to spec-safe behavior may not prompt before running it.",
"remediation": "Declare accurate annotations, and gate destructive tools on user confirmation regardless.",
"location": {
"kind": "tool",
"name": "lichess_get_cloud_eval"
},
"data": {
"tags": [
"code-exec"
]
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "medium",
"confidence": "strong",
"untrustedInput": [
"get_game_archives",
"lichess_get_users"
],
"sensitiveSource": [],
"externalSink": [
"lichess_get_cloud_eval",
"lichess_get_user_studies"
],
"selfContained": false,
"description": "Untrusted input can drive an external action even though no sensitive source is exposed."
}
],
"capabilities": [
{
"tool": "get_player_profile",
"tags": [],
"reasons": {}
},
{
"tool": "get_player_stats",
"tags": [],
"reasons": {}
},
{
"tool": "is_player_online",
"tags": [],
"reasons": {}
},
{
"tool": "get_current_daily_games",
"tags": [],
"reasons": {}
},
{
"tool": "get_games_to_move",
"tags": [],
"reasons": {}
},
{
"tool": "get_game_archives",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "get_monthly_archives",
"tags": [],
"reasons": {}
},
{
"tool": "get_monthly_archive_pgn",
"tags": [],
"reasons": {}
},
{
"tool": "get_player_clubs",
"tags": [],
"reasons": {}
},
{
"tool": "get_player_tournaments",
"tags": [],
"reasons": {}
},
{
"tool": "get_player_matches",
"tags": [],
"reasons": {}
},
{
"tool": "get_titled_players",
"tags": [],
"reasons": {}
},
{
"tool": "get_club_profile",
"tags": [],
"reasons": {}
},
{
"tool": "get_club_members",
"tags": [],
"reasons": {}
},
{
"tool": "get_club_matches",
"tags": [],
"reasons": {}
},
{
"tool": "get_tournament",
"tags": [],
"reasons": {}
},
{
"tool": "get_tournament_round",
"tags": [],
"reasons": {}
},
{
"tool": "get_tournament_round_group",
"tags": [],
"reasons": {}
},
{
"tool": "get_team_match",
"tags": [],
"reasons": {}
},
{
"tool": "get_team_match_board",
"tags": [],
"reasons": {}
},
{
"tool": "get_live_team_match",
"tags": [],
"reasons": {}
},
{
"tool": "get_live_team_match_board",
"tags": [],
"reasons": {}
},
{
"tool": "get_country_profile",
"tags": [],
"reasons": {}
},
{
"tool": "get_country_players",
"tags": [],
"reasons": {}
},
{
"tool": "get_country_clubs",
"tags": [],
"reasons": {}
},
{
"tool": "get_daily_puzzle",
"tags": [],
"reasons": {}
},
{
"tool": "get_random_puzzle",
"tags": [],
"reasons": {}
},
{
"tool": "get_streamers",
"tags": [],
"reasons": {}
},
{
"tool": "get_leaderboards",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_user",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_user_status",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_rating_history",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_perf_stats",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_user_activity",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_user_games",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_game",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_current_game",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_leaderboards",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_leaderboard",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_daily_puzzle",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_puzzle",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_next_puzzle",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_storm_dashboard",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_team",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_search_teams",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_user_teams",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_team_members",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_popular_teams",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_team_swiss_tournaments",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_team_arena_tournaments",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_current_tournaments",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_tournament",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_user_tournaments",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_tv_channels",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_tv_games",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_streamers",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_crosstable",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_cloud_eval",
"tags": [
"code-exec"
],
"reasons": {
"code-exec": [
"keyword \"eval\" in tool name"
]
}
},
{
"tool": "lichess_get_fide_player",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_search_fide_players",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_autocomplete_players",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_export_games_by_ids",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_users",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "lichess_get_swiss",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_swiss_results",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_swiss_games",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_export_swiss_trf",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_tournament_results",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_tournament_teams",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_tournament_games",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_simuls",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_user_studies",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"export_to\""
]
}
},
{
"tool": "lichess_export_study_pgn",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_export_study_chapter_pgn",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_broadcasts",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_top_broadcasts",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_broadcasts_by_user",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_broadcast_round_pgn",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_broadcast",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_broadcast_round",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_broadcast_pgn",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_opening_explorer",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_get_masters_game_pgn",
"tags": [],
"reasons": {}
},
{
"tool": "lichess_tablebase",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "52e749959d4732c9bc2f3bde75203d3c7433eaacd6703bf68a4248d543eba1e0",
"stats": {
"tools": 84,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 1,
"medium": 1,
"low": 1,
"info": 0
}
}
}