zernio_update_contact

Update an existing contact

SERVERZernio SOURCEeyalm321/zernio-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/eyalm321-zernio-mcp/zernio-update-contact.md

WHAT IT DOES

What zernio_update_contact does on Zernio

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

RISK

Why zernio_update_contact is rated Medium

This tool creates or modifies contact data reversibly, which fits the Write category. The severity is medium because updating contacts could expose or modify personal information, but the operation is reversible and doesn't involve financial transactions, code execution, or irreversible deletion.

From the tool's definition Tool name 'zernio_update_contact' and description 'Update an existing contact' indicate modification of contact data in a social media management system.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs zernio_update_contact safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Zernio, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For zernio_update_contact, this is the rule to start with:

zernio_update_contact Rate-limited

zernio_update_contact 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": {
    "zernio_update_contact": {
      "limits": [
        {
          "counter": "zernio_update_contact_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Zernio, apply this rule, and every zernio_update_contact call is checked against it from then on.

FAQ

Questions about zernio_update_contact

What does the zernio_update_contact tool do? +

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

How do I enforce a policy on zernio_update_contact? +

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

What risk level is zernio_update_contact? +

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

Can I rate-limit zernio_update_contact? +

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

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

zernio_update_contact is provided by the Zernio MCP server (eyalm321/zernio-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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