mcp@0.33.2

VERIFIED

Publisher claims: "MCP server for debuff: lets AI agents inspect, build, test and play a debuff game" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry npm (MCP server)Publisher debuffjp · publishing for 29 daysInstalls 10,773Last detonated 30 h ago
$claude mcp add mcp -- npx -y @debuffjp/mcp
WatchReport an issue

Coverage

Server started and answered tools/list.
Tested
MCP initialize and tools/list · every tool description, for hidden instructions · every file read, file written and host contacted by what ran
Not tested
what the tools do when called with real credentials

Before you give it your token

It will ask for
no credential variables read in the code
Where it talks to
no vendor host named in the code
What the honeypot saw
no credential files read · no network
What we could not test
what the tools do when called with real credentials

Reasonable to connect. No credential asked for, no third-party host named, Server started and answered tools/list.

Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.

Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios) on 2026-11-13 and scored it 91/100 (Verified). It did what it claims and nothing else we could detect: no undeclared network egress, no credential reads, no persistent instruction writes. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 39 s · 2 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
18sprocessdependency install exit 0
38sclaimed26 tools: inspect_project, doctor, list_assets, typecheck, build, run_tests, run_scenarios, fuzz, game_start, game_state, game_step, game_command, game_input, game_params, game_set_param, game_capture, game_clip, game_pause, game_frames, game_profile, game_notes, game_replay, game_rewind, game_errors, game_stop
38stoolsa037c0367f9301c9
38stoolsa7b7dba4509f1818
38stools41d946bb2d0de8de
38stools88b2d1775f105615
38stools705eea836845a7d8
38stools72d97ba1c83ba768
38stoolsf4014d679897fc97
38stoolsda6560f4fec7e460
38stoolsf784cb61f8571034
38stools24ee705d49b2f810
38stoolsd9995c930a795d19
38stoolsfcec322450eaf75a
38stools44fd335aab8797b8
38stoolsece4ab543fafe255
38stools1a4a8b60e42b9de0
38stools81938d71c100a979
38stools9e241c32693e56b2
38stoolse93ee68e63689dc8
38stools4187fae623a5c53e
38stools169e37a66124f597
38stoolsa3479b37fd4b5bae
38stools3112046c47875771
38stoolscae7d897e687d79d
38stools9607a653b3cd45c9
38stoolse95bd5cb53984885
38stoolsfc6762380f098cf9
38sprocessscript backend runs setup only
38sprocessno install scripts to re-run

Static findings

LOW
Unpinned dependencydist/session.js:134 · Unpinned dependency? `${error}: the game's @debuffjp/dev is older than this tool. Update it (npm i -D @debuffjp/dev@latest).`Fix: Pin the exact version (`[email protected]`, `==1.2.3`) so every install gets the bytes that were reviewed.
AST06

No other findings across 1,223 lines in 16 files.

Cost to the agent

Instructions loaded
≈55 tok
1 file · 16 in bundle
Tool list per prompt
≈4,462 tok
26 tools · 172 per tool
Handshake
1251 ms
launch to tools/list, stdio
Undocumented tools
0
description under 20 chars · avg 299

Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.

Known vulnerabilities

No advisories in OSV for @debuffjp/mcp@0.33.2 as of 30 h ago. This is the package itself, not its dependencies.