coord_claim_task · Session Coord MCP: Risk & Policy

WHAT IT DOES

What coord_claim_task does on Session Coord

AI agents use coord_claim_task 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_claim_task needs a policy

This tool modifies the ownership/assignment state of a task, which is a reversible write operation. It doesn't execute code, delete data, or involve finances. Misuse could cause coordination issues (e.g., blocking other sessions from claiming tasks), hence medium severity.

From the tool's definition 'Claim ownership of a task for a session' — assigns/reserves a task to a specific session, modifying task state

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

coord_claim_task Rate-limited

coord_claim_task 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_claim_task": {
      "limits": [
        {
          "counter": "coord_claim_task_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_claim_task

What does the coord_claim_task tool do? +

Claim ownership of a task for a session. 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_claim_task? +

Register the Session Coord MCP server in PolicyLayer and add a rule for coord_claim_task: 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_claim_task? +

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

Can I rate-limit coord_claim_task? +

Yes. Add a rate_limit block to the coord_claim_task 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_claim_task completely? +

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

coord_claim_task 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.