signavio_create_model

THE RISK

Medium Risk

Why signavio_create_model needs a policy

This tool creates new process models/diagrams, which is a reversible data modification operation. It does not delete, execute code, move money, or trigger external commands. The blast radius is medium because creating many unwanted models could clutter the process repository and require cleanup, but the action is fully reversible via deletion.

From the tool's definition Tool name is 'signavio_create_model' with description 'Create a new model/diagram' — explicitly creates new data in the Signavio Process Manager system.

Documented attack patterns abuse exactly the kind of access signavio_create_model gives an agent:

POLICY

How to control signavio_create_model

PolicyLayer is an MCP gateway — it sits between your AI agents and Signavio MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for signavio_create_model:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "signavio_create_model": {
      "limits": [
        {
          "counter": "signavio_create_model_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

signavio_create_model 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.

Create a free account and register Signavio MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Signavio MCP Server tools

Destructive signavio_delete_dictionary_entry Delete a dictionary entry Destructive signavio_delete_folder Permanently delete a folder and all its contents Write signavio_create_dictionary_category Create a new dictionary category Write signavio_create_dictionary_entry Create a new dictionary entry Write signavio_create_folder Create a new folder Write signavio_move_folder Move a folder to a new parent or to trash Write signavio_move_model Move a model to a different folder Write signavio_publish_model Publish one or more models to Process Collaboration Hub

All 23 Signavio MCP Server tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about signavio_create_model

What does the signavio_create_model tool do? +

Create a new model/diagram. It is categorised as a Write tool in the Signavio MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on signavio_create_model? +

Register the Signavio MCP Server MCP server in PolicyLayer and add a rule for signavio_create_model: 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 Signavio MCP Server. Nothing to install.

What risk level is signavio_create_model? +

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

Can I rate-limit signavio_create_model? +

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

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

signavio_create_model is provided by the Signavio MCP Server MCP server (willpowell8/signavio-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Signavio MCP Server tool call.

Start from Signavio MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →