rollback_skill · Friday MCP Server MCP: Risk & Policy

WHAT IT DOES

What rollback_skill does on Friday MCP Server

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

WHY IT NEEDS A POLICY

Why rollback_skill needs a policy

Rolling back a skill restores a previous version of it, which is a reversible modification of data (overwriting the current skill with a backup). This is a Write operation since it modifies the active skill to a prior state, and the current version may be overwritten (but backups exist, implying some reversibility).

From the tool's definition Restore the latest or selected backup of a skill

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

rollback_skill Rate-limited

rollback_skill 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": {
    "rollback_skill": {
      "limits": [
        {
          "counter": "rollback_skill_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 Friday MCP Server, so you can run agents against it safely.

FAQ

Questions about rollback_skill

What does the rollback_skill tool do? +

Restore the latest or selected backup of a skill. It is categorised as a Write tool in the Friday MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on rollback_skill? +

Register the Friday MCP Server MCP server in PolicyLayer and add a rule for rollback_skill: 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 Friday MCP Server. Nothing to install.

What risk level is rollback_skill? +

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

Can I rate-limit rollback_skill? +

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

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

rollback_skill is provided by the Friday MCP Server MCP server (jeremylakeyjr/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.