signavio_create_dictionary_category

THE RISK

Medium Risk

Why signavio_create_dictionary_category needs a policy

Creating a dictionary category is a reversible write operation that adds metadata to the system but does not delete data or execute arbitrary code. It modifies the system state (adds a new category) but the change can be undone via deletion.

From the tool's definition Tool name is 'signavio_create_dictionary_category' and description states 'Create a new dictionary category' — this is a create operation that adds new data to the Signavio system.

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

POLICY

How to control signavio_create_dictionary_category

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_dictionary_category:

policy.json

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

signavio_create_dictionary_category 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.

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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_entry Create a new dictionary entry Write signavio_create_folder Create a new folder Write signavio_create_model Create a new model/diagram 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_dictionary_category

What does the signavio_create_dictionary_category tool do? +

Create a new dictionary category. 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_dictionary_category? +

Register the Signavio MCP Server MCP server in PolicyLayer and add a rule for signavio_create_dictionary_category: 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_dictionary_category? +

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

Can I rate-limit signavio_create_dictionary_category? +

Yes. Add a rate_limit block to the signavio_create_dictionary_category 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_dictionary_category completely? +

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

signavio_create_dictionary_category 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.

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