patchEmailTemplateWithId

Updates, via PATCH, the email template with the given Id.

SERVERFusionauth SOURCE@fusionauth/mcp-api

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/io-fusionauth-mcp-api/patchemailtemplatewithid.md

WHAT IT DOES

What patchEmailTemplateWithId does on Fusionauth

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

RISK

Why patchEmailTemplateWithId is rated Medium

This tool modifies email templates reversibly through a standard PATCH operation. It creates or alters configuration data but does not delete it irreversibly or execute arbitrary code. The impact is bounded to email template configuration; misuse could disrupt email communications or inject malicious content into templates, but changes can be reverted.

From the tool's definition Tool description states "Updates, via PATCH, the email template with the given Id" — PATCH is an HTTP method for partial modification of resources.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs patchEmailTemplateWithId safely

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

patchEmailTemplateWithId Rate-limited

patchEmailTemplateWithId 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": {
    "patchEmailTemplateWithId": {
      "limits": [
        {
          "counter": "patchemailtemplatewithid_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 Fusionauth, apply this rule, and every patchEmailTemplateWithId call is checked against it from then on.

FAQ

Questions about patchEmailTemplateWithId

What does the patchEmailTemplateWithId tool do? +

Updates, via PATCH, the email template with the given Id. It is categorised as a Write tool in the Fusionauth MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on patchEmailTemplateWithId? +

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

What risk level is patchEmailTemplateWithId? +

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

Can I rate-limit patchEmailTemplateWithId? +

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

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

patchEmailTemplateWithId is provided by the Fusionauth MCP server (@fusionauth/mcp-api). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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