Get all student extensions for a specific assignment.
AI agents call tool_get_extensions to retrieve information from Gradescope MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves extension data for students on an assignment. It queries existing information without creating, modifying, deleting, or executing any operations. The action is purely informational and read-only, making it a Read category tool with low severity since exposing extension information has minimal blast radius for misuse.
From the tool's definition Tool name 'tool_get_extensions' and description 'Get all student extensions' indicate a retrieval operation with no modification or side effects.
Documented attack patterns abuse exactly the kind of access tool_get_extensions gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Gradescope MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for tool_get_extensions:
{
"version": "1",
"default": "deny",
"tools": {
"tool_get_extensions": {}
}
}tool_get_extensions is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get all student extensions for a specific assignment. It is categorised as a Read tool in the Gradescope MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Gradescope MCP Server MCP server in PolicyLayer and add a rule for tool_get_extensions: 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 Gradescope MCP Server. Nothing to install.
tool_get_extensions 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 tool_get_extensions 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 tool_get_extensions. 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.
tool_get_extensions is provided by the Gradescope MCP Server MCP server (yuanpeng-li/gradescope-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Gradescope MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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37 Gradescope MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.