Browser Tools — 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": "mcp-browser-tools",
"source": {
"kind": "package",
"origin": "mcp-browser-tools"
},
"server": {
"name": "mcp-browser-tools"
}
},
"grade": "A",
"score": {
"score": 95,
"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": "moderate",
"label": "capability blast radius (moderate) — client exposure if the model is manipulated",
"appliedPenalty": 3
},
{
"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": "moderate",
"reasons": [
"can send data / act on an external service"
],
"tags": [
"external-sink"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (36 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-003",
"title": "Hardcoded egress to an external endpoint (dist/mcp-server.js)",
"category": "exfiltration",
"severity": "medium",
"confidence": "strong",
"description": "In the server's implementation (`dist/mcp-server.js:57`): A hardcoded outbound call to a fixed external host inside server code is a classic exfiltration/telemetry channel — especially paired with reads of local data. 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": "dist/mcp-server.js"
},
"evidence": "const response = await fetch(`http://${host}:${port}/.identity`, { signal: AbortSignal.timeout(1000) });",
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"data": {
"rule": "MTC-SRC-003",
"file": "dist/mcp-server.js",
"line": 57,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-003",
"title": "Hardcoded egress to an external endpoint (mcp-server.ts)",
"category": "exfiltration",
"severity": "medium",
"confidence": "strong",
"description": "In the server's implementation (`mcp-server.ts:56`): A hardcoded outbound call to a fixed external host inside server code is a classic exfiltration/telemetry channel — especially paired with reads of local data. 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": "mcp-server.ts"
},
"evidence": "const response = await fetch(`http://${host}:${port}/.identity`, { signal: AbortSignal.timeout(1000) }); if (re",
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"data": {
"rule": "MTC-SRC-003",
"file": "mcp-server.ts",
"line": 56,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SUP-011",
"title": "Package declares no source repository",
"category": "supply-chain",
"severity": "info",
"confidence": "strong",
"description": "\"mcp-browser-tools\" 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": "mcp-browser-tools"
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "getConsoleLogs",
"tags": [],
"reasons": {}
},
{
"tool": "getConsoleErrors",
"tags": [],
"reasons": {}
},
{
"tool": "getNetworkLogs",
"tags": [],
"reasons": {}
},
{
"tool": "getNetworkErrors",
"tags": [],
"reasons": {}
},
{
"tool": "takeScreenshot",
"tags": [],
"reasons": {}
},
{
"tool": "getSelectedElement",
"tags": [],
"reasons": {}
},
{
"tool": "wipeLogs",
"tags": [],
"reasons": {}
},
{
"tool": "runAccessibilityAudit",
"tags": [],
"reasons": {}
},
{
"tool": "runPerformanceAudit",
"tags": [],
"reasons": {}
},
{
"tool": "runSEOAudit",
"tags": [],
"reasons": {}
},
{
"tool": "runNextJSAudit",
"tags": [],
"reasons": {}
},
{
"tool": "runDebuggerMode",
"tags": [],
"reasons": {}
},
{
"tool": "runAuditMode",
"tags": [],
"reasons": {}
},
{
"tool": "runBestPracticesAudit",
"tags": [],
"reasons": {}
},
{
"tool": "checkNavigationStatus",
"tags": [],
"reasons": {}
},
{
"tool": "enableNavigation",
"tags": [],
"reasons": {}
},
{
"tool": "analyzeConsoleErrors",
"tags": [],
"reasons": {}
},
{
"tool": "trackConsoleWarnings",
"tags": [],
"reasons": {}
},
{
"tool": "detectAPIErrors",
"tags": [],
"reasons": {}
},
{
"tool": "compareScreenshotsOverTime",
"tags": [],
"reasons": {}
},
{
"tool": "trackImprovementTrends",
"tags": [],
"reasons": {}
},
{
"tool": "detectConsolePatterns",
"tags": [],
"reasons": {}
},
{
"tool": "trackResourceLoading",
"tags": [],
"reasons": {}
},
{
"tool": "detectLayoutIssues",
"tags": [],
"reasons": {}
},
{
"tool": "extractPageMetadata",
"tags": [],
"reasons": {}
},
{
"tool": "summarizeConsoleActivity",
"tags": [],
"reasons": {}
},
{
"tool": "identifyUnusedResources",
"tags": [],
"reasons": {}
},
{
"tool": "extractColorPalette",
"tags": [],
"reasons": {}
},
{
"tool": "assessPageComplexity",
"tags": [],
"reasons": {}
},
{
"tool": "exportDevelopmentData",
"tags": [],
"reasons": {}
},
{
"tool": "createPageHealthSummary",
"tags": [],
"reasons": {}
},
{
"tool": "generateLighthouseCI",
"tags": [],
"reasons": {}
},
{
"tool": "createPerformanceBudget",
"tags": [],
"reasons": {}
},
{
"tool": "analyzeNetworkPerformance",
"tags": [],
"reasons": {}
},
{
"tool": "analyzeTechStack",
"tags": [],
"reasons": {}
},
{
"tool": "generateComprehensiveReport",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "1d5a4a93025c5c19a349d676eca37222decb50a3bf1684b4c4623b60fb697ad6",
"stats": {
"tools": 36,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 0,
"medium": 2,
"low": 0,
"info": 1
}
}
}