tool_modify_assignment_dates

THE RISK

Medium Risk

Why tool_modify_assignment_dates needs a policy

The tool modifies assignment dates, which is a reversible change to course management data. This is a Write operation (update). Severity is high because modifying assignment dates affects the entire course: changing deadlines could lock students out of submissions, shift grading schedules, or create administrative chaos. However, it is not Destructive (dates can be changed back) and not Financial.

From the tool's definition Tool name 'modify_assignment_dates' indicates the tool creates or modifies assignment metadata (dates). The Gradescope server description confirms it handles 'assignment management' and 'grading workflows.' The empty description reduces confidence slightly,…

Documented attack patterns abuse exactly the kind of access tool_modify_assignment_dates gives an agent:

POLICY

How to control tool_modify_assignment_dates

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_modify_assignment_dates:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "tool_modify_assignment_dates": {
      "limits": [
        {
          "counter": "tool_modify_assignment_dates_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

tool_modify_assignment_dates stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Gradescope MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about tool_modify_assignment_dates

What does the tool_modify_assignment_dates tool do? +

tool_modify_assignment_dates. It is categorised as a Write tool in the Gradescope MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on tool_modify_assignment_dates? +

Register the Gradescope MCP Server MCP server in PolicyLayer and add a rule for tool_modify_assignment_dates: 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.

What risk level is tool_modify_assignment_dates? +

tool_modify_assignment_dates is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit tool_modify_assignment_dates? +

Yes. Add a rate_limit block to the tool_modify_assignment_dates 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.

How do I block tool_modify_assignment_dates completely? +

Set action: deny in the PolicyLayer policy for tool_modify_assignment_dates. 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.

What MCP server provides tool_modify_assignment_dates? +

tool_modify_assignment_dates 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.

Enforce policy on every Gradescope MCP Server tool call.

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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