hooks_session-restore · Claude Flow MCP: Risk & Policy

WHAT IT DOES

What hooks_session-restore does on Claude Flow

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

WHY IT NEEDS A POLICY

Why hooks_session-restore needs a policy

Restoring a session modifies the current execution environment by reloading prior state, which is a reversible write operation. It does not execute arbitrary commands (Execute), permanently delete data (Destructive), or move money (Financial).

From the tool's definition Tool name is 'hooks_session-restore' and description states 'Restore a previous session', indicating it modifies or reconstructs prior state. The description is incomplete ('Use when native Bash hooks (via Claude Code\'), limiting full assessment.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

hooks_session-restore Rate-limited

hooks_session-restore 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": {
    "hooks_session-restore": {
      "limits": [
        {
          "counter": "hooks_session-restore_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 Claude Flow, so you can run agents against it safely.

FAQ

Questions about hooks_session-restore

What does the hooks_session-restore tool do? +

Restore a previous session Use when native Bash hooks (via Claude Code\. It is categorised as a Write tool in the Claude Flow MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on hooks_session-restore? +

Register the Claude Flow MCP server in PolicyLayer and add a rule for hooks_session-restore: 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 Claude Flow. Nothing to install.

What risk level is hooks_session-restore? +

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

Can I rate-limit hooks_session-restore? +

Yes. Add a rate_limit block to the hooks_session-restore 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 hooks_session-restore completely? +

Set action: deny in the PolicyLayer policy for hooks_session-restore. 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 hooks_session-restore? +

hooks_session-restore is provided by the Claude Flow MCP server (claude-flow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.