contacts_replace

A write tool on the ServiceTitan MCP server.

SERVERServiceTitan MCP Server SOURCEjordandalton/servicetitanmcpserver

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/jordandalton-servicetitanmcpserver/contacts-replace.md

WHAT IT DOES

What contacts_replace does on ServiceTitan MCP Server

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

RISK

Why contacts_replace is rated Medium

The tool name suggests it replaces contact data, which is a reversible write operation. However, 'replace' could potentially overwrite existing data, which warrants 'high' severity due to data loss risk if misused.

From the tool's definition Tool name 'contacts_replace' indicates data replacement/overwrite operation. No description provided, but 'replace' semantics typically mean updating or overwriting existing contact records.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs contacts_replace safely

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

contacts_replace Rate-limited

contacts_replace 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": {
    "contacts_replace": {
      "limits": [
        {
          "counter": "contacts_replace_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 ServiceTitan MCP Server, apply this rule, and every contacts_replace call is checked against it from then on.

FAQ

Questions about contacts_replace

What does the contacts_replace tool do? +

contacts_replace is a write tool on the ServiceTitan MCP Server MCP server. It is categorised as a Write tool in the ServiceTitan 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 contacts_replace? +

Register the ServiceTitan MCP Server MCP server in PolicyLayer and add a rule for contacts_replace: 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 ServiceTitan MCP Server. Nothing to install.

What risk level is contacts_replace? +

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

Can I rate-limit contacts_replace? +

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

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

contacts_replace is provided by the ServiceTitan MCP Server MCP server (jordandalton/servicetitanmcpserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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