Canvas Agent
MCP server that connects AI assistants to Instructure Canvas LMS, enabling teachers and administrators to manage courses, assignments, grades, and more through natural language.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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hughsibbele
Source: Glama
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Install from
The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
CANVAS_AGENT_ANONYMIZEThe whole pipeline can be disabled with =0 (turns off both anonymization and free-text name detection) or CANVAS_AGENT_SANDBOX=0 (turns off only the prompt-injection wrapper).CANVAS_AGENT_SANDBOXThe whole pipeline can be disabled with CANVAS_AGENT_ANONYMIZE=0 (turns off both anonymization and free-text name detection) or =0 (turns off only the prompt-injection wrapper).CANVAS_API_TOKENcp .env.example .env # add your CANVAS_API_URL andCANVAS_API_URLcp .env.example .env # add your and CANVAS_API_TOKENTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
134/134 tools missing one or more hints — get_course_activity (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_course_assignment_analytics (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_student_summaries (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +131 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tool inputs are validated
126/134 tool handlers declare input schemas (94%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
Only 7/134 tool handlers wrap calls in try/catch (5%)
Wrap each tool handler body in try/catch and return a structured error response.
Tests exist
No test files found
Add tests that exercise each declared tool.
Production dependencies are patched
0 critical, 3 high severity in production deps — @modelcontextprotocol/sdk@1.12.1 (high), @modelcontextprotocol/sdk@1.12.1 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
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