Joan MCP Server
@pollychrome/joan-mcp
npm
v2.5.0
Published by @pollychrome — no publish provenance, so origin is unverified, but the source is public: the repository link below is self-declared yet readable, so you can inspect the code before adopting it.
MCP server for Joan productivity app - enables AI assistants to manage projects, tasks, goals, milestones, and notes
The grade answers one question — how safe is this server for you to adopt — so it is computed in two auditable stages. Nothing below is an opinion or an LLM's guess; every line is a real term the deterministic engine applied, and the same input always yields the same number.
1. Threat score — 100 − 0 = 100. What the published surface and source actually contain:
The deterministic scan raised no scored threat in the surface it inspected — the threat score stayed at 100. Capability observations and advisory notes are recorded but never lower it.
2. Client adoption risk — 100 − 7 = 93. Three small, subtract-only factors that reflect your risk in adopting it — a clean scan proves less on a powerful, unverified or barely-inspectable package, so the grade says so plainly:
| Points | Adoption-risk factor |
|---|---|
| −6 | capability blast radius (high) — client exposure if the model is manipulated |
| −1 | publisher verification (public source) — no provenance, but the source is public and inspectable |
Capability observations and info notes are shown under Findings but never scored.
Open any row's finding below for the file, line and evidence behind a deduction.
Findings 5
high Shell/command execution in server code (dist/cli.js)MTC-SRC-002
In the server's implementation (`dist/cli.js:6`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: rt { spawn } from 'node:child_process'; import { createRequire } from 'node:module'; import { fileURLToPath } from 'node
Fix: 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: server dist/cli.js
medium Tool "unlink_task_from_goal" can modify the filesystemMTC-CAP-002
Tool "unlink_task_from_goal" can write, overwrite or delete files (keyword "unlink" in tool name). Verify it is scoped to a safe directory.
Fix: Constrain file operations to an explicit, non-sensitive root; reject path traversal.
Location: tool unlink_task_from_goal
medium Tool "unlink_task_from_milestone" can modify the filesystemMTC-CAP-002
Tool "unlink_task_from_milestone" can write, overwrite or delete files (keyword "unlink" in tool name). Verify it is scoped to a safe directory.
Fix: Constrain file operations to an explicit, non-sensitive root; reject path traversal.
Location: tool unlink_task_from_milestone
low Mutating tool "unlink_task_from_goal" declares no destructiveHintMTC-CAP-005
Tool "unlink_task_from_goal" can mutate/egress but declares no destructiveHint. Clients that don't default to spec-safe behavior may not prompt before running it.
Fix: Declare accurate annotations, and gate destructive tools on user confirmation regardless.
Location: tool unlink_task_from_goal
low Mutating tool "unlink_task_from_milestone" declares no destructiveHintMTC-CAP-005
Tool "unlink_task_from_milestone" can mutate/egress but declares no destructiveHint. Clients that don't default to spec-safe behavior may not prompt before running it.
Fix: Declare accurate annotations, and gate destructive tools on user confirmation regardless.
Location: tool unlink_task_from_milestone
Tools 75
Each tool and what it can reach — statically extracted from the published source.
get_attachment_download_urlingests untrusted inputunlink_task_from_goalwrites filesunlink_task_from_milestonewrites filesupload_attachmentingests untrusted inputadd_tag_to_taskno sensitive capabilitybulk_update_tasksno sensitive capabilitycomplete_taskno sensitive capabilityconfirm_daily_planno sensitive capabilitycreate_columnno sensitive capabilitycreate_goalno sensitive capability
Show 65 more tools ↓
create_milestoneno sensitive capabilitycreate_milestone_commentno sensitive capabilitycreate_milestone_resourceno sensitive capabilitycreate_noteno sensitive capabilitycreate_projectno sensitive capabilitycreate_project_resourceno sensitive capabilitycreate_project_tagno sensitive capabilitycreate_taskno sensitive capabilitycreate_task_commentno sensitive capabilitycreate_task_resourceno sensitive capabilitydelete_attachmentno sensitive capabilitydelete_columnno sensitive capabilitydelete_goalno sensitive capabilitydelete_milestoneno sensitive capabilitydelete_milestone_commentno sensitive capabilitydelete_milestone_resourceno sensitive capabilitydelete_noteno sensitive capabilitydelete_project_resourceno sensitive capabilitydelete_project_tagno sensitive capabilitydelete_taskno sensitive capabilitydelete_task_commentno sensitive capabilitydelete_task_resourceno sensitive capabilitygenerate_daily_planno sensitive capabilityget_actionable_tasksno sensitive capabilityget_attachmentno sensitive capabilityget_daily_planno sensitive capabilityget_milestoneno sensitive capabilityget_projectno sensitive capabilityget_project_attachment_hierarchyno sensitive capabilityget_project_tagno sensitive capabilityget_storage_usageno sensitive capabilityget_taskno sensitive capabilityget_task_tagsno sensitive capabilitylink_task_to_goalno sensitive capabilitylink_tasks_to_milestoneno sensitive capabilitylist_attachmentsno sensitive capabilitylist_columnsno sensitive capabilitylist_goalsno sensitive capabilitylist_milestone_commentsno sensitive capabilitylist_milestone_resourcesno sensitive capabilitylist_milestonesno sensitive capabilitylist_project_resourcesno sensitive capabilitylist_project_tagsno sensitive capabilitylist_projectsno sensitive capabilitylist_task_commentsno sensitive capabilitylist_task_resourcesno sensitive capabilitylist_tasksno sensitive capabilityremove_tag_from_taskno sensitive capabilityreorder_columnsno sensitive capabilitysearch_tasksno sensitive capabilityset_task_tagsno sensitive capabilityupdate_attachmentno sensitive capabilityupdate_columnno sensitive capabilityupdate_daily_planno sensitive capabilityupdate_goalno sensitive capabilityupdate_milestoneno sensitive capabilityupdate_milestone_commentno sensitive capabilityupdate_milestone_resourceno sensitive capabilityupdate_noteno sensitive capabilityupdate_projectno sensitive capabilityupdate_project_resourceno sensitive capabilityupdate_project_tagno sensitive capabilityupdate_taskno sensitive capabilityupdate_task_commentno sensitive capabilityupdate_task_resourceno sensitive capability
What this scan could not see
- Tools were statically extracted from the published source (75 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>".
Versions 2
Scan history per published version. The engine is deterministic — the same version always yields the same score, so a changed score means the package itself changed.
| Version | Score | Findings | Engine | Scanned |
|---|---|---|---|---|
v2.5.0 latest |
A 93/100 | 5 | 1.13.0 | 2026-09-07 |
v2.4.0 |
A 93/100 | 5 | 1.9.0 | 2026-07-24 |
Embed this score
Show this server's live Trust Score in your README, docs or website. The badge is served straight from the registry and updates automatically after every rescan — no API key needed. It links back to this page, so anyone who sees the grade can also read the findings behind it instead of taking a number on faith.
Verify this score yourself
The score above is reproducible: the same package version always yields the same result. Run it locally or over the free API — no account, no LLM, fully deterministic.
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