retrieveThemeWithId

Retrieves the theme for the given Id.

SERVERFusionauth SOURCE@fusionauth/mcp-api

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-fusionauth-mcp-api/retrievethemewithid.md

WHAT IT DOES

What retrieveThemeWithId does on Fusionauth

AI agents call retrieveThemeWithId to retrieve information from Fusionauth without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why retrieveThemeWithId is rated Low

This tool performs a simple query to fetch theme configuration data by ID. It has no capability to modify, delete, or execute operations. The blast radius of misuse is minimal — an attacker could learn theme details but cannot alter system state or access sensitive user data beyond what the theme object itself contains.

From the tool's definition Tool name contains 'retrieve' and description states 'Retrieves the theme for the given Id' — a data retrieval operation with no modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

retrieveThemeWithId Allowed

retrieveThemeWithId is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "retrieveThemeWithId": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about retrieveThemeWithId

What does the retrieveThemeWithId tool do? +

Retrieves the theme for the given Id. It is categorised as a Read tool in the Fusionauth MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on retrieveThemeWithId? +

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

retrieveThemeWithId is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit retrieveThemeWithId? +

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

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

retrieveThemeWithId 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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