This record as markdown: /tools/io-fusionauth-mcp-api/deleteformwithid.md
What deleteFormWithId does on Fusionauth
AI agents call deleteFormWithId to permanently remove resources in Fusionauth, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why deleteFormWithId is rated Critical
The tool permanently removes a form resource by ID. Deletion of form data cannot be undone and constitutes a destructive action with potential blast radius depending on the form's usage (affecting user registrations, authentications, or other critical workflows). Severity is high rather than critical because the impact is scoped to a single form resource, though forms may be critical to application functionality.
From the tool's definition Tool name contains 'delete' and description states 'Deletes the form for the given Id' - this is an irreversible deletion operation.
Attacks that exploit this kind of access
The rule that runs deleteFormWithId 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 deleteFormWithId, this is the rule to start with:
deleteFormWithId is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Fusionauth, apply this rule, and every deleteFormWithId call is checked against it from then on.
Questions about deleteFormWithId
Deletes the form for the given Id. It is categorised as a Destructive tool in the Fusionauth MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Fusionauth MCP server in PolicyLayer and add a rule for deleteFormWithId: 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.
deleteFormWithId is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the deleteFormWithId 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 deleteFormWithId. 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.
deleteFormWithId 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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