createFormWithId
Creates a form. You can optionally specify an Id for the form, if not provided one will be generated.
This record as markdown: /tools/io-fusionauth-mcp-api/createformwithid.md
What createFormWithId does on Fusionauth
AI agents use createFormWithId 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.
Why createFormWithId is rated Medium
This tool creates new forms in FusionAuth, a reversible operation that modifies system state by adding data. It is not destructive (forms can be deleted/updated), does not execute arbitrary code, and has no financial impact. The medium severity reflects that uncontrolled form creation could pollute the system or be used to create malicious forms for phishing or social engineering if an AI agent misuses it.
From the tool's definition Tool name 'createFormWithId' and description 'Creates a form' indicate data creation. The phrase 'You can optionally specify an Id' confirms this is a reversible write operation that adds new records to the system.
Attacks that exploit this kind of access
The rule that runs createFormWithId 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 createFormWithId, this is the rule to start with:
createFormWithId 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Fusionauth, apply this rule, and every createFormWithId call is checked against it from then on.
Questions about createFormWithId
Creates a form. You can optionally specify an Id for the form, if not provided one will be generated. 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.
Register the Fusionauth MCP server in PolicyLayer and add a rule for createFormWithId: 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.
createFormWithId is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the createFormWithId 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.
Set action: deny in the PolicyLayer policy for createFormWithId. 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.
createFormWithId 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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