patchThemeWithId

Updates, via PATCH, the theme 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/patchthemewithid.md

WHAT IT DOES

What patchThemeWithId does on Fusionauth

AI agents use patchThemeWithId 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 patchThemeWithId is rated Medium

This tool creates or modifies data reversibly by updating a theme resource. It does not delete data (Destructive), execute arbitrary code (Execute), move money (Financial), or read-only retrieve data (Read).

From the tool's definition Tool name 'patchThemeWithId' and description 'Updates, via PATCH, the theme with the given Id' clearly indicate modification of existing data using HTTP PATCH method.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs patchThemeWithId 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 patchThemeWithId, this is the rule to start with:

patchThemeWithId Rate-limited

patchThemeWithId 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": {
    "patchThemeWithId": {
      "limits": [
        {
          "counter": "patchthemewithid_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 patchThemeWithId call is checked against it from then on.

FAQ

Questions about patchThemeWithId

What does the patchThemeWithId tool do? +

Updates, via PATCH, the theme 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 patchThemeWithId? +

Register the Fusionauth MCP server in PolicyLayer and add a rule for patchThemeWithId: 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 patchThemeWithId? +

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

Can I rate-limit patchThemeWithId? +

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

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

patchThemeWithId 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.

KEEP EXPLORING

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