restore_invoice

Restore a previously deleted DRAFT invoice.

SERVERFavCRM SOURCEhttps://api.favcrm.io/mcp

Medium RISK CLASS

Category Write

Parameters 11 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-favcrm-favcrm/restore-invoice.md

WHAT IT DOES

What restore_invoice does on FavCRM

AI agents use restore_invoice to create or update resources in FavCRM, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your FavCRM environment.

Parameter	Type	Required	Description
`invoiceId`	string	Yes	Invoice ID to restore

Parameters from the server's own tool schema.

RISK

Why restore_invoice is rated Medium

This tool restores data that was previously deleted, which is a reversible write operation. It recreates an invoice record (modify state), but only for DRAFT invoices that haven't been finalized or sent. The scope is limited to draft status, reducing severity. A misused restore could add unwanted draft invoices back to the system, but since they're drafts (not finalized), this is correctable.

From the tool's definition Tool name 'restore_invoice' and description 'Restore a previously deleted DRAFT invoice' indicate a data recovery operation that modifies system state by un-deleting a DRAFT invoice.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs restore_invoice safely

PolicyLayer is an MCP gateway: it sits between your AI agents and FavCRM, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For restore_invoice, this is the rule to start with:

restore_invoice Rate-limited

restore_invoice 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": {
    "restore_invoice": {
      "limits": [
        {
          "counter": "restore_invoice_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 FavCRM, apply this rule, and every restore_invoice call is checked against it from then on.

FAQ

Questions about restore_invoice

What does the restore_invoice tool do? +

Restore a previously deleted DRAFT invoice. It is categorised as a Write tool in the FavCRM MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does restore_invoice accept? +

restore_invoice accepts 1 parameter: invoiceId. Required: invoiceId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on restore_invoice? +

Register the FavCRM MCP server in PolicyLayer and add a rule for restore_invoice: 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 FavCRM. Nothing to install.

What risk level is restore_invoice? +

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

Can I rate-limit restore_invoice? +

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

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

restore_invoice is provided by the FavCRM MCP server (https://api.favcrm.io/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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