update_config · ZugaShield MCP: Risk & Policy

WHAT IT DOES

What update_config does on ZugaShield

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

WHY IT NEEDS A POLICY

Why update_config needs a policy

This tool modifies configuration state, which is a Write operation. Severity is high because misconfiguring a 7-layer security system could disable or weaken critical AI agent protections, leading to prompt injection, data exfiltration, or malicious tool execution. However, it is not Destructive because configuration changes are typically reversible by updating again. Financial impact is indirect at best.

From the tool's definition Tool name is 'update_config' and description states 'Update ZugaShield configuration'. The verb 'update' indicates modification of existing data (configuration settings).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_config Rate-limited

update_config 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": {
    "update_config": {
      "limits": [
        {
          "counter": "update_config_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 ZugaShield, so you can run agents against it safely.

FAQ

Questions about update_config

What does the update_config tool do? +

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

How do I enforce a policy on update_config? +

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

What risk level is update_config? +

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

Can I rate-limit update_config? +

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

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

update_config is provided by the ZugaShield MCP server (zuga-technologies/zugashield). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.