deactivate_skill · Friday MCP Server MCP: Risk & Policy

WHAT IT DOES

What deactivate_skill does on Friday MCP Server

AI agents use deactivate_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 deactivate_skill needs a policy

Deactivating a skill changes its state (from active to inactive) but does not permanently delete it. This is a reversible modification — the skill can be reactivated — making it a Write operation. Misuse could disrupt agent capabilities but the effect is recoverable.

From the tool's definition Deactivate an installed skill

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

deactivate_skill Rate-limited

deactivate_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": {
    "deactivate_skill": {
      "limits": [
        {
          "counter": "deactivate_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 deactivate_skill

What does the deactivate_skill tool do? +

Deactivate an installed 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 deactivate_skill? +

Register the Friday MCP Server MCP server in PolicyLayer and add a rule for deactivate_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 deactivate_skill? +

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

Can I rate-limit deactivate_skill? +

Yes. Add a rate_limit block to the deactivate_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 deactivate_skill completely? +

Set action: deny in the PolicyLayer policy for deactivate_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 deactivate_skill? +

deactivate_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.