List all rubrics for a specific course
AI agents call list-rubrics to retrieve information from Canvas MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns rubric data without modifying, deleting, or executing any operations. It is a straightforward data retrieval function consistent with other 'list-' tools in the server (list-assignments, list-courses, list-students, etc.). The blast radius of misuse is minimal—unauthorized reading of rubric data poses only informational exposure risk within an educational context.
From the tool's definition Tool name 'list-rubrics' and description 'List all rubrics for a specific course' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
List all rubrics for a specific course. It is categorised as a Read tool in the Canvas MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Canvas MCP Server MCP server in PolicyLayer and add a rule for list-rubrics: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Canvas MCP Server. Nothing to install.
list-rubrics is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list-rubrics rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for list-rubrics. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
list-rubrics is provided by the Canvas MCP Server MCP server (ranver/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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