retrieveVersionWithId

Retrieves the FusionAuth version string.

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/retrieveversionwithid.md

WHAT IT DOES

What retrieveVersionWithId does on Fusionauth

AI agents call retrieveVersionWithId 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 retrieveVersionWithId is rated Low

This tool only retrieves version information, which is read-only data retrieval with no capability to modify state, execute operations, or cause any harmful side effects. The blast radius of misuse is minimal—an attacker would only learn the FusionAuth version number, which is typically low-impact information disclosure.

From the tool's definition Tool name 'retrieveVersionWithId' and description 'Retrieves the FusionAuth version string' indicate a query operation that returns system metadata without modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

retrieveVersionWithId Allowed

retrieveVersionWithId 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": {
    "retrieveVersionWithId": {}
  }
}

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 retrieveVersionWithId call is checked against it from then on.

FAQ

Questions about retrieveVersionWithId

What does the retrieveVersionWithId tool do? +

Retrieves the FusionAuth version string. 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 retrieveVersionWithId? +

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

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

Can I rate-limit retrieveVersionWithId? +

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

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

retrieveVersionWithId 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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