create-or-update-contact · Sidemail MCP Server MCP

WHAT IT DOES

What create-or-update-contact does on Sidemail MCP Server

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

WHY IT NEEDS A POLICY

Why create-or-update-contact needs a policy

This tool creates or modifies contact data in the Sidemail system. These are reversible operations (contacts can be deleted or modified again), so it falls under Write rather than Destructive.

From the tool's definition Tool name 'create-or-update-contact' and description 'Create or update a contact' explicitly indicate data modification operations. The verb 'create-or-update' is a clear Write operation: creates new contact records or modifies existing ones reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create-or-update-contact Rate-limited

create-or-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": {
    "create-or-update-contact": {
      "limits": [
        {
          "counter": "create-or-update-contact_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 Sidemail MCP Server, so you can run agents against it safely.

FAQ

Questions about create-or-update-contact

What does the create-or-update-contact tool do? +

Create or update a contact (Sidemail API). It. It is categorised as a Write tool in the Sidemail 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 create-or-update-contact? +

Register the Sidemail MCP Server MCP server in PolicyLayer and add a rule for create-or-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 Sidemail MCP Server. Nothing to install.

What risk level is create-or-update-contact? +

create-or-update-contact is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create-or-update-contact? +

Yes. Add a rate_limit block to the create-or-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 create-or-update-contact completely? +

Set action: deny in the PolicyLayer policy for create-or-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 create-or-update-contact? +

create-or-update-contact is provided by the Sidemail MCP Server MCP server (sidemail/sidemail-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.