skill_update_permissions · LocalAnt MCP: Risk & Policy

WHAT IT DOES

What skill_update_permissions does on LocalAnt

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

WHY IT NEEDS A POLICY

Why skill_update_permissions needs a policy

This tool creates or modifies data (skill permissions/configuration) in a reversible manner. Categorized as Write rather than Execute because it updates configuration rather than running arbitrary operations.

From the tool's definition Tool name 'skill_update_permissions' and description 'Update a skill' indicate modification of skill configuration.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

skill_update_permissions Rate-limited

skill_update_permissions 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": {
    "skill_update_permissions": {
      "limits": [
        {
          "counter": "skill_update_permissions_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches LocalAnt, so you can run agents against it safely.

FAQ

Questions about skill_update_permissions

What does the skill_update_permissions tool do? +

Update a skill. It is categorised as a Write tool in the LocalAnt MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on skill_update_permissions? +

Register the LocalAnt MCP server in PolicyLayer and add a rule for skill_update_permissions: 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 LocalAnt. Nothing to install.

What risk level is skill_update_permissions? +

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

Can I rate-limit skill_update_permissions? +

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

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

skill_update_permissions is provided by the LocalAnt MCP server (yuga-hashimoto/localant). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.