close_thread · Mcp Coordinator MCP: Risk & Policy

WHAT IT DOES

What close_thread does on Mcp Coordinator

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

WHY IT NEEDS A POLICY

Why close_thread needs a policy

Closing a thread is a write operation that modifies coordination metadata without deleting data or executing external code. The blast radius is low since it only affects thread status within the coordination system, not actual file modifications or destructive operations. The operation is reversible in nature (threads can be reopened), distinguishing it from destructive actions.

From the tool's definition Tool description states 'Close a consultation thread' which performs a state change operation on a thread object, modifying its status from open to closed.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

close_thread Rate-limited

close_thread 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": {
    "close_thread": {
      "limits": [
        {
          "counter": "close_thread_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 Mcp Coordinator, so you can run agents against it safely.

FAQ

Questions about close_thread

What does the close_thread tool do? +

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

How do I enforce a policy on close_thread? +

Register the Mcp Coordinator MCP server in PolicyLayer and add a rule for close_thread: 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 Mcp Coordinator. Nothing to install.

What risk level is close_thread? +

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

Can I rate-limit close_thread? +

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

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

close_thread is provided by the Mcp Coordinator MCP server (swoofer/mcp-coordinator). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.