updateEntityTypePermissionWithId

Updates the permission with the given Id for the entity type.

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/updateentitytypepermissionwithid.md

WHAT IT DOES

What updateEntityTypePermissionWithId does on Fusionauth

AI agents use updateEntityTypePermissionWithId 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 updateEntityTypePermissionWithId is rated Medium

This tool creates or modifies permissions in FusionAuth, which is reversible (permissions can be updated again or reverted). It does not delete or destroy data (Destructive), nor does it execute arbitrary code (Execute). The high severity reflects that permission modifications can significantly impact access control and security posture if misused by an agent, affecting multiple users or resources.

From the tool's definition Tool name contains 'update' and description states 'Updates the permission with the given Id for the entity type' — this modifies existing permission data.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

updateEntityTypePermissionWithId Rate-limited

updateEntityTypePermissionWithId 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": {
    "updateEntityTypePermissionWithId": {
      "limits": [
        {
          "counter": "updateentitytypepermissionwithid_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 updateEntityTypePermissionWithId call is checked against it from then on.

FAQ

Questions about updateEntityTypePermissionWithId

What does the updateEntityTypePermissionWithId tool do? +

Updates the permission with the given Id for the entity type. 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 updateEntityTypePermissionWithId? +

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

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

Can I rate-limit updateEntityTypePermissionWithId? +

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

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

updateEntityTypePermissionWithId 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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