coord_register_session · Session Coord MCP: Risk & Policy

WHAT IT DOES

What coord_register_session does on Session Coord

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

WHY IT NEEDS A POLICY

Why coord_register_session needs a policy

This tool creates a new session entry in a shared coordination system, modifying the workspace state reversibly. It does not delete, execute arbitrary commands, move money, or trigger external side effects—just records a new session.

From the tool's definition Tool name contains 'register' and description states 'Register a new coding session in the shared workspace', indicating creation of a new session record in a coordinated multi-agent workspace.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

coord_register_session Rate-limited

coord_register_session 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": {
    "coord_register_session": {
      "limits": [
        {
          "counter": "coord_register_session_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 Session Coord, so you can run agents against it safely.

FAQ

Questions about coord_register_session

What does the coord_register_session tool do? +

Register a new coding session in the shared workspace. It is categorised as a Write tool in the Session Coord MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on coord_register_session? +

Register the Session Coord MCP server in PolicyLayer and add a rule for coord_register_session: 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 Session Coord. Nothing to install.

What risk level is coord_register_session? +

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

Can I rate-limit coord_register_session? +

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

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

coord_register_session is provided by the Session Coord MCP server (lingfeng-vels/session-coord-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.