discussion_reply · Lockstep MCP: Risk & Policy

WHAT IT DOES

What discussion_reply does on Lockstep

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

WHY IT NEEDS A POLICY

Why discussion_reply needs a policy

The tool creates new content (a reply message) in a reversible manner. It does not read-only query data (Read), does not execute arbitrary code or commands (Execute), does not permanently delete data (Destructive), and does not involve financial transactions (Financial). The action is reversible—replies can typically be edited or deleted later.

From the tool's definition Tool name is 'discussion_reply' and description states it 'Reply to an existing discussion thread.' This performs a create/modify operation on discussion data—adding a new reply message to an existing thread.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

discussion_reply Rate-limited

discussion_reply 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": {
    "discussion_reply": {
      "limits": [
        {
          "counter": "discussion_reply_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 Lockstep, so you can run agents against it safely.

FAQ

Questions about discussion_reply

What does the discussion_reply tool do? +

Reply to an existing discussion thread. It is categorised as a Write tool in the Lockstep MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on discussion_reply? +

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

What risk level is discussion_reply? +

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

Can I rate-limit discussion_reply? +

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

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

discussion_reply is provided by the Lockstep MCP server (tmmoore286/lockstep-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.