{"$schema":"https://verifymcp.io/schemas/trust-report.json","schemaVersion":1,"license":{"name":"CC BY-NC 4.0","url":"https://creativecommons.org/licenses/by-nc/4.0/"},"generatedAt":"2026-11-06T10:41:10.947Z","url":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab","markdownUrl":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab.md","server":{"slug":"cloudlabworks-mcp-failure-lab","name":"MCP Failure Lab","registryName":"io.github.cloudlabworks/mcp-failure-lab","description":"Deliberately faulty MCP server for testing how agent clients handle tool errors and disconnects.","registryStatus":"active","deletedAt":null,"statusMessage":null,"liveness":"live","publisher":{"class":"unknown","claimed":false}},"component":{"slug":"ghcr-io-cloudlabworks-mcp-failure-lab","type":"oci","identifier":"ghcr.io/cloudlabworks/mcp-failure-lab","withdrawn":false,"url":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab","version":"0.1.2","transport":"stdio","scoredAt":"2026-11-06T10:30:46.626Z"},"score":{"total":45,"tier":"low","status":"scored","weekDelta":null,"history":[{"date":"2026-11-06","total":45},{"date":"2026-11-05","total":45},{"date":"2026-11-04","total":44},{"date":"2026-11-03","total":44},{"date":"2026-11-02","total":33}]},"categories":[{"name":"Supply Chain Security","score":0,"verdict":"unverified","reasons":["No malware scan is available for this kind of package: the supply-chain vendors we use do not cover it. This is a permanent gap in our coverage, not a finding about the package.","Known CVEs could not be checked: this artifact ships no SBOM or dependency manifest, so there is no dependency list to read.","Install-script risk not yet assessed.","Dependency health could not be checked: this artifact ships no SBOM or dependency manifest, so there is no dependency list to read."],"codes":[{"code":"supplychain.malware_inconclusive","args":{"reason":"ecosystem_unsupported"}},{"code":"cve.inconclusive","args":{"reason":"no_sbom_attached"}},{"code":"installscript.inconclusive","args":{"reason":"no_install_concept"}},{"code":"dephealth.inconclusive","args":{"reason":"no_sbom_attached"}}]},{"name":"Provenance & Transparency","score":100,"verdict":"pass","reasons":["Source repository is publicly reachable at the declared URL.","Cryptographically verified build provenance (signed, bound to cloudlabworks/mcp-failure-lab).","Clear OSI-approved license (MIT).","Actively maintained (last published 3 days ago).","Publishes a security disclosure policy (SECURITY.md)."],"codes":[{"code":"provenance.repo_verified","args":{}},{"code":"provenance.verified","args":{"repo":"cloudlabworks/mcp-failure-lab"}},{"code":"license.osi","args":{"spdx":"MIT"}},{"code":"maintenance.recent","args":{"age_days":"3"}},{"code":"disclosure.present","args":{}}]},{"name":"Schema Quality & AI Usability","score":45,"verdict":"fail","reasons":["AI-judged instruction clarity (poor).","Tool/resource definitions use about 30 tokens (~30/item across 1 items; 1 tools + 0 resources), lean.","Usage-examples check failed: none of the tools include examples."],"codes":[{"code":"schema.ai_quality","args":{"band":"poor"}},{"code":"schema.footprint_lean","args":{"avg":"30","items":"1","tools":"1","tokens":"30","resources":"0"}},{"code":"schema.examples_absent","args":{}}]},{"name":"Stability & Change Management","score":13,"verdict":"partial","reasons":["Stability observed for 4 of 30 days with no destabilising changes; credit accrues until the full window elapses."],"codes":[{"code":"stability.building_history","args":{"days":"4"}}]},{"name":"Tool Coverage","score":67,"verdict":"fail","reasons":["100% of tools have a non-trivial description (not blank, and not just the tool's name).","0% of tool parameters carry a description."],"codes":[{"code":"toolquality.descriptions","args":{"pct":"100"}},{"code":"toolquality.param_docs","args":{"pct":"0"}}]},{"name":"Tool Safety","score":100,"verdict":"pass","reasons":["No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.","We read all 1 captured tool definition(s), and no name or description among them implies an irreversible operation.","An AI judge read all 1 captured unit(s) of tool text and found none that tries to manipulate the model reading it."],"codes":[{"code":"toolsafety.injection_clean","args":{}},{"code":"toolsafety.destructive_none","args":{"tools":"1"}},{"code":"toolsafety.manipulation_clean","args":{"units":"1","judged":"1"}}]},{"name":"Capabilities","score":100,"verdict":"pass","reasons":["Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28."],"codes":[{"code":"protocol.supported","args":{"latest":"2026-07-28","version":"2025-11-25"}}]}],"inconclusive":["No malware scan is available for this kind of package: the supply-chain vendors we use do not cover it. This is a permanent gap in our coverage, not a finding about the package.","Known CVEs could not be checked: this artifact ships no SBOM or dependency manifest, so there is no dependency list to read.","Install-script risk not yet assessed.","Dependency health could not be checked: this artifact ships no SBOM or dependency manifest, so there is no dependency list to read."],"malware":[],"components":[{"slug":"ghcr-io-cloudlabworks-mcp-failure-lab","type":"oci","identifier":"ghcr.io/cloudlabworks/mcp-failure-lab","withdrawn":false,"score":45,"current":true,"url":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab","markdownUrl":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab.md"}],"facts":[{"label":"Registry","value":"oci"},{"label":"Package","value":"ghcr.io/cloudlabworks/mcp-failure-lab"},{"label":"Version","value":"0.1.2"},{"label":"Transport","value":"stdio"}],"install":{"available":true,"bundleSha256":null},"tools":[{"name":"lab_probe","title":null,"description":"Synthetic failure-lab probe. No external services, filesystem changes or credentials.","inputs":[{"name":"message","type":"string","required":false,"description":null}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":30}],"toolsTruncatedAtCapture":false,"diagnostics":{"capturedAt":"2026-11-06T10:30:46.000Z","track":"package","endpoint":null,"declaredUrl":null,"truncated":false,"tls":null,"dnssec":null,"auth":null,"httpsRedirect":null,"transports":[],"provenance":{"outcome":"verified","label":"Verified","reason":"verified","reasonLabel":"Verified","discovery":"referrers","discoveryLabel":"OCI referrers API","sourceRepo":null,"attestationSkipped":null,"attestationSkippedLabel":null},"installScripts":[],"installScriptsTotal":null,"vulnerabilities":[],"vulnerabilitiesTotal":null,"dependencies":null},"mismatches":[],"changelog":{"trackingSince":"2026-11-02","recent":[{"id":"chg_01a1ab44-c6d2-7476-89e8-e3eaa06116b2","kind":"score.total_changed","summary":"Trust score (44 → 45)","materiality":"functional","direction":"improvement","scoreDelta":1,"occurredOn":"2026-11-05","url":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab#chg-chg_01a1ab44-c6d2-7476-89e8-e3eaa06116b2"},{"id":"chg_01a19f19-28cd-76a0-9e46-5173b574341f","kind":"check.verdict","summary":"Provenance (fail → pass)","materiality":"security","direction":"improvement","scoreDelta":null,"occurredOn":"2026-11-03","url":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab#chg-chg_01a19f19-28cd-76a0-9e46-5173b574341f"},{"id":"chg_01a19f19-28ce-7a8f-b7a1-11f9250ba086","kind":"provenance.repo_changed","summary":"The attested source repository moved (cloudlabworks/mcp-failure-lab)","materiality":"security","direction":"neutral","scoreDelta":null,"occurredOn":"2026-11-03","url":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab#chg-chg_01a19f19-28ce-7a8f-b7a1-11f9250ba086"},{"id":"chg_01a19f19-28cf-7422-8de7-4d14de4450f4","kind":"package.version_changed","summary":"Package version (0.1.1 → 0.1.2)","materiality":"functional","direction":"neutral","scoreDelta":null,"occurredOn":"2026-11-03","url":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab#chg-chg_01a19f19-28cf-7422-8de7-4d14de4450f4"},{"id":"chg_01a19f19-28cf-7f11-9773-7de0db3a5a25","kind":"score.total_changed","summary":"Trust score (33 → 44)","materiality":"functional","direction":"improvement","scoreDelta":11,"occurredOn":"2026-11-03","url":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab#chg-chg_01a19f19-28cf-7f11-9773-7de0db3a5a25"},{"id":"chg_01a19dfd-4760-7b74-a4c4-f94bec4a70bc","kind":"score.first_scored","summary":"First indexed and scored","materiality":"functional","direction":"neutral","scoreDelta":null,"occurredOn":"2026-11-02","url":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab#chg-chg_01a19dfd-4760-7b74-a4c4-f94bec4a70bc"}],"truncated":false,"feedUrl":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab/changelog.json"},"links":{"html":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab","markdown":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab.md","changelogJson":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab/changelog.json","changelogRss":"https://verifymcp.io/servers/cloudlabworks-mcp-failure-lab/ghcr-io-cloudlabworks-mcp-failure-lab.xml","external":[{"label":"GitHub Container Registry","href":"https://ghcr.io/cloudlabworks/mcp-failure-lab"},{"label":"Repository","href":"https://github.com/cloudlabworks/mcp-failure-lab"}]}}