Skills/npm/jui-tools-mcp-server

jui-tools-mcp-server@2.27.0

CAUTION· install only

Publisher claims: "MCP server for JsonUI project management - wraps jui and jsonui-doc CLIs plus component spec lookup" Observed in sandbox: calls raw.githubusercontent.com only, touches nothing outside the project, writes no memory.

Registry npm (MCP server)Publisher tai-kim · publishing for 104 daysInstalls 3,668Last detonated 1 h ago
What would fix thisWatchDispute verdict

Coverage

Install scripts ran; no agent task scenario for this bundle.
Tested
install scripts, with decoy credentials in place · second launch with the clock 45 days ahead · every file read, file written and host contacted by what ran
Not tested
use of the skill by an agent

What changed since 2.24.0

vet-skills diff jui-tools-mcp-server 2.24.0 2.27.0

In the sandbox, this version reached for nothing 2.24.0 did not. Compared from the two recorded runs, not from source.

The guard can hold an update like this until someone approves it (runtime.on_change: hold). A change that only shows with a real credential, or on a path the run did not reach, is not in a trace and so not in this comparison.

Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios; install scripts ran; no agent task scenario for this bundle) on 2026-11-15 and scored it 68/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Pipe-to-shell pattern; Direct script execution from GitHub raw URL; Pipe-to-shell pattern. Summary: calls raw.githubusercontent.com only, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 1 s · 2 scenarios
t+CategoryObserved action
0.0sprocessinstall script run in the sandbox
0.2snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.2snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.2snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.2snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.2snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.2snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.2snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.2snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.2snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.2sprocessscript backend runs setup only
0.2sprocessscript backend runs setup only
0.3sprocesssecond launch, clock +45 days, CI unset
0.5snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.5snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.5snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.5snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.5snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.5snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.5snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.5snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused
0.5snetworkCONNECT tcp://raw.githubusercontent.com:443 · not in the allow-list, refused

Static findings

CRITICAL
Pipe-to-shell patterndist/tools/viz/viz_common.d.ts:9 · Pipe-to-shell pattern — downloads and immediately executes remote codeexport declare const UPDATE_JUI = "curl -fsSL https://raw.githubusercontent.com/Tai-Kimura/jsonui-cli/main/installer/bootstrap.sh | bash";Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST06
MEDIUM
Remote installer piped to shellsrc/tools/viz/viz_common.ts:15 · Remote installer piped to shell"curl -fsSL https://raw.githubusercontent.com/Tai-Kimura/jsonui-cli/main/installer/bootstrap.sh | bash";Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST07
HIGH
Direct script execution from GitHub raw URLdist/tools/viz/viz_common.js:10 · Direct script execution from GitHub raw URL — unverified code sourceexport const UPDATE_JUI = "curl -fsSL https://raw.githubusercontent.com/Tai-Kimura/jsonui-cli/main/installer/bootstrap.sh | bash";Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
CRITICAL
Pipe-to-shell patterndist/tools/viz/viz_common.js:10 · Pipe-to-shell pattern — downloads and immediately executes remote codeexport const UPDATE_JUI = "curl -fsSL https://raw.githubusercontent.com/Tai-Kimura/jsonui-cli/main/installer/bootstrap.sh | bash";Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST06
HIGH
Access to sensitive file pathsdist/tools/infra/infra_seed.js:10 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files* tfvars or .env values), and its report (what it read, what it could not place). By default the draft is written toFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/tools/infra/infra_seed.ts:60 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files…se/PaaS files, SDK imports and env var names — never Terraform state, tfvars or .env values). Returns the draft's counts and nodes (id, category, provider, service,…Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Remote installer piped to shelldist/tools/viz/viz_common.js:10 · Remote installer piped to shellexport const UPDATE_JUI = "curl -fsSL https://raw.githubusercontent.com/Tai-Kimura/jsonui-cli/main/installer/bootstrap.sh | bash";Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST07
HIGH
Direct script execution from GitHub raw URLdist/tools/viz/viz_common.d.ts:9 · Direct script execution from GitHub raw URL — unverified code sourceexport declare const UPDATE_JUI = "curl -fsSL https://raw.githubusercontent.com/Tai-Kimura/jsonui-cli/main/installer/bootstrap.sh | bash";Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
CRITICAL
Pipe-to-shell patternsrc/tools/viz/viz_common.ts:15 · Pipe-to-shell pattern — downloads and immediately executes remote code"curl -fsSL https://raw.githubusercontent.com/Tai-Kimura/jsonui-cli/main/installer/bootstrap.sh | bash";Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST06
HIGH
Access to sensitive file pathssrc/tools/infra/infra_seed.ts:13 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files* tfvars or .env values), and its report (what it read, what it could not place). By default the draft is written toFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Direct script execution from GitHub raw URLsrc/tools/viz/viz_common.ts:15 · Direct script execution from GitHub raw URL — unverified code source"curl -fsSL https://raw.githubusercontent.com/Tai-Kimura/jsonui-cli/main/installer/bootstrap.sh | bash";Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
Remote installer piped to shelldist/tools/viz/viz_common.d.ts:9 · Remote installer piped to shellexport declare const UPDATE_JUI = "curl -fsSL https://raw.githubusercontent.com/Tai-Kimura/jsonui-cli/main/installer/bootstrap.sh | bash";Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST07
HIGH
Access to sensitive file pathsdist/tools/infra/infra_seed.js:53 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files…se/PaaS files, SDK imports and env var names — never Terraform state, tfvars or .env values). Returns the draft's counts and nodes (id, category, provider, service,…Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05

Cost to the agent

Instructions loaded
≈55 tok
1 file · 81 in bundle

Tokens estimated at four characters each. Skills load their instruction text when triggered; the figure is what that costs.

Known vulnerabilities

Not checked against OSV yet; the weekly check has not reached this version.

What would make this Verified

12 points to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%
  1. Pipe-to-shell pattern≈ +9 on the totalBuild commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
  2. Unclaimed publisher≈ +8 on the totalClaim tai-kim: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  3. Direct script execution from GitHub raw URL≈ +4 on the totalPin versions and sources; vendor anything fetched at install time.
  4. Access to sensitive file paths≈ +4 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
  5. Remote installer piped to shell≈ +2 on the totalBuild commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
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