recover_session

THE RISK

Low Risk

Why recover_session needs a policy

Although 'repair' might suggest Write, the context indicates this tool is designed for recovery and observability of corrupted sessions, meaning repairs are restorative rather than creational. Extracting content is inherently a read operation.

From the tool's definition Tool description states 'Diagnose, repair, or extract content from a Claude Code session.' The core functions are diagnosing issues, repairing (reversible restoration), and extracting content—all read-oriented operations that retrieve or examine session data…

Documented attack patterns abuse exactly the kind of access recover_session gives an agent:

POLICY

How to control recover_session

PolicyLayer is an MCP gateway — it sits between your AI agents and Claude Code Toolkit, and nothing reaches the server without passing your rules. This is the rule we recommend for recover_session:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "recover_session": {}
  }
}

recover_session is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Claude Code Toolkit — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Claude Code Toolkit tools

Destructive cleanup_backups Delete old backup files to free up disk space. Destructive wipe_traces Securely wipe ALL Claude Code traces. Overwrites files with zeros before deletion. Require Destructive clean_claude_directory Analyze and clean the .claude directory. Removes debug logs, empty todos, old snapshots, a Destructive clean_traces Selectively clean Claude Code traces by category, age, or project. Destructive enforce_retention Apply data retention policy by deleting sessions older than specified days. Execute run_doctor Full integrity check: detects corrupted JSONL lines, truncated thinking blocks, oversized Execute run_maintenance Run maintenance checks on Claude Code installation. Identifies issues, old backups, and ar Execute start_dashboard Start the web dashboard on a local port. Returns the URL to open in a browser.

All 40 Claude Code Toolkit tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about recover_session

What does the recover_session tool do? +

Diagnose, repair, or extract content from a Claude Code session. Use for corrupted or crashed sessions. It is categorised as a Read tool in the Claude Code Toolkit MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on recover_session? +

Register the Claude Code Toolkit MCP server in PolicyLayer and add a rule for recover_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 Claude Code Toolkit. Nothing to install.

What risk level is recover_session? +

recover_session is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit recover_session? +

Yes. Add a rate_limit block to the recover_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 recover_session completely? +

Set action: deny in the PolicyLayer policy for recover_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 recover_session? +

recover_session is provided by the Claude Code Toolkit MCP server (asifkibria/claude-code-toolkit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Claude Code Toolkit tool call.

Start from Claude Code Toolkit, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →