accept_answer · Edstem MCP: Risk & Policy

WHAT IT DOES

What accept_answer does on Edstem

AI agents use accept_answer to create or update resources in Edstem — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Edstem environment.

WHY IT NEEDS A POLICY

Why accept_answer needs a policy

Accepting an answer modifies the state of a thread/comment (marking it as accepted answer), which is a reversible write operation. It does not delete data, execute code, or involve financial transactions. The blast radius is medium since it affects the visibility and resolution status of discussion threads.

From the tool's definition Accept a comment as the answer to a question thread

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

accept_answer Rate-limited

accept_answer 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.

View as policy code

policy.json

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

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Edstem, so you can run agents against it safely.

FAQ

Questions about accept_answer

What does the accept_answer tool do? +

Accept a comment as the answer to a question thread. It is categorised as a Write tool in the Edstem MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on accept_answer? +

Register the Edstem MCP server in PolicyLayer and add a rule for accept_answer: 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 Edstem. Nothing to install.

What risk level is accept_answer? +

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

Can I rate-limit accept_answer? +

Yes. Add a rate_limit block to the accept_answer 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 accept_answer completely? +

Set action: deny in the PolicyLayer policy for accept_answer. 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 accept_answer? +

accept_answer is provided by the Edstem MCP server (rob-9/edstem-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.