Canvas Agent MCP Server
canvas-agent
npm
v2.0.3
Published by hughsibbele — 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 Instructure Canvas LMS — connect Claude AI to your courses
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 4
critical Completed toxic-flow trifecta across toolsMTC-FLOW-002
This server (without client built-ins) exposes a complete data-exfiltration chain: download_discussion_entries → list_course_files → send_message. Untrusted input is ingested, private data is read, and it can be sent to an external sink via the agent composing the tools (→). Static analysis proves the primitive exists, not that a specific run will occur.
Fix: Remove one leg of the trifecta: isolate untrusted-input tools from secret-reading tools and from egress tools, or require human approval between them.
Location: flow download_discussion_entries → list_course_files → send_message
medium Tool "delete_file" can modify the filesystemMTC-CAP-002
Tool "delete_file" can write, overwrite or delete files (keyword "delete_file" 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 delete_file
low Mutating tool "delete_file" declares no destructiveHintMTC-CAP-005
Tool "delete_file" 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 delete_file
low Shell/command execution in packaging/dev tooling (dist/setup.js)MTC-SRC-002
In a packaging/dev/install script (shipped, but not the server runtime) (`dist/setup.js:8`): 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: c, execFileSync } from "child_process"; import { stdin, stdout, platform } from "process"; import { readFileSync, writeF
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/setup.js
Tools 134
Each tool and what it can reach — statically extracted from the published source.
delete_filewrites filesdownload_discussion_entriesingests untrusted inputdownload_submissionsingests untrusted inputgenerate_quiz_reportingests untrusted inputget_fileingests untrusted inputget_pageingests untrusted inputlist_course_filesreads sensitive datalist_pagesingests untrusted inputsend_messagenetwork egressadd_module_itemno sensitive capability
Show 124 more tools ↓
add_user_to_groupno sensitive capabilityassociate_rubricno sensitive capabilityauto_distribute_unassignedno sensitive capabilitybatch_update_assignmentsno sensitive capabilitybatch_update_datesno sensitive capabilitybatch_update_discussionsno sensitive capabilitybulk_gradeno sensitive capabilityconclude_courseno sensitive capabilitycopy_course_contentno sensitive capabilitycopy_rubricno sensitive capabilitycreate_announcementno sensitive capabilitycreate_assignmentno sensitive capabilitycreate_assignment_overrideno sensitive capabilitycreate_calendar_eventno sensitive capabilitycreate_courseno sensitive capabilitycreate_discussionno sensitive capabilitycreate_folderno sensitive capabilitycreate_groupno sensitive capabilitycreate_group_setno sensitive capabilitycreate_moduleno sensitive capabilitycreate_new_quizno sensitive capabilitycreate_pageno sensitive capabilitycreate_quiz_itemno sensitive capabilitycreate_rubricno sensitive capabilitycreate_sectionno sensitive capabilitycrosslist_sectionno sensitive capabilitydecrosslist_sectionno sensitive capabilitydelete_assignmentno sensitive capabilitydelete_calendar_eventno sensitive capabilitydelete_courseno sensitive capabilitydelete_enrollmentno sensitive capabilitydelete_moduleno sensitive capabilitydelete_module_itemno sensitive capabilitydelete_pageno sensitive capabilitydelete_quiz_itemno sensitive capabilitydelete_rubricno sensitive capabilitydelete_rubric_assessmentno sensitive capabilitydelete_sectionno sensitive capabilitydescribe_canvas_mcpsno sensitive capabilityenroll_userno sensitive capabilityget_assignmentno sensitive capabilityget_course_activityno sensitive capabilityget_course_assignment_analyticsno sensitive capabilityget_course_schedule_overviewno sensitive capabilityget_discussionno sensitive capabilityget_file_quotano sensitive capabilityget_front_pageno sensitive capabilityget_grading_standardsno sensitive capabilityget_late_policyno sensitive capabilityget_new_quizno sensitive capabilityget_outcomeno sensitive capabilityget_outcome_rollupsno sensitive capabilityget_quizno sensitive capabilityget_quiz_itemno sensitive capabilityget_rubricno sensitive capabilityget_rubric_assessmentsno sensitive capabilityget_student_activityno sensitive capabilityget_student_assignment_datano sensitive capabilityget_student_enrollmentsno sensitive capabilityget_student_messaging_datano sensitive capabilityget_student_summariesno sensitive capabilityget_user_profileno sensitive capabilitygrade_submissionno sensitive capabilitygrade_with_rubricno sensitive capabilityhide_gradesno sensitive capabilitylist_assignment_groupsno sensitive capabilitylist_assignment_overridesno sensitive capabilitylist_assignmentsno sensitive capabilitylist_calendar_eventsno sensitive capabilitylist_course_tabsno sensitive capabilitylist_coursesno sensitive capabilitylist_discussionsno sensitive capabilitylist_foldersno sensitive capabilitylist_gradeable_studentsno sensitive capabilitylist_grading_periodsno sensitive capabilitylist_group_categoriesno sensitive capabilitylist_groupsno sensitive capabilitylist_missing_submissionsno sensitive capabilitylist_module_itemsno sensitive capabilitylist_modulesno sensitive capabilitylist_new_quizzesno sensitive capabilitylist_outcome_groupsno sensitive capabilitylist_outcome_resultsno sensitive capabilitylist_outcomesno sensitive capabilitylist_page_revisionsno sensitive capabilitylist_quiz_itemsno sensitive capabilitylist_quizzesno sensitive capabilitylist_rubricsno sensitive capabilitylist_sectionsno sensitive capabilitylist_studentsno sensitive capabilitylist_submissionsno sensitive capabilitylist_term_coursesno sensitive capabilitylist_termsno sensitive capabilitylist_users_in_courseno sensitive capabilitymove_student_to_sectionno sensitive capabilitypost_gradesno sensitive capabilitypost_submission_commentno sensitive capabilitypublish_moduleno sensitive capabilityremove_rubric_from_assignmentno sensitive capabilityremove_user_from_groupno sensitive capabilityreset_course_contentno sensitive capabilityset_late_policyno sensitive capabilityset_quiz_accommodationsno sensitive capabilitysubmission_summaryno sensitive capabilityupdate_assignmentno sensitive capabilityupdate_assignment_datesno sensitive capabilityupdate_assignment_overrideno sensitive capabilityupdate_calendar_eventno sensitive capabilityupdate_course_navigationno sensitive capabilityupdate_course_settingsno sensitive capabilityupdate_discussionno sensitive capabilityupdate_enrollment_stateno sensitive capabilityupdate_fileno sensitive capabilityupdate_moduleno sensitive capabilityupdate_module_itemno sensitive capabilityupdate_new_quizno sensitive capabilityupdate_pageno sensitive capabilityupdate_quizno sensitive capabilityupdate_quiz_datesno sensitive capabilityupdate_quiz_itemno sensitive capabilityupdate_rubricno sensitive capabilityupdate_rubric_assessmentno sensitive capabilityupdate_rubric_associationno sensitive capabilityupdate_sectionno sensitive capability
Toxic flows 1
Cross-tool combinations that form a data-exfiltration primitive (untrusted input → sensitive source → external sink).
What this scan could not see
- Tools were statically extracted from the published source (134 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 |
|---|---|---|---|---|
v2.0.3 latest |
A 93/100 | 4 | 1.13.0 | 2026-09-07 |
v2.0.2 |
A 93/100 | 4 | 1.12.1 | 2026-08-10 |
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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