signavio_get_model_revisions

THE RISK

Low Risk

Why signavio_get_model_revisions needs a policy

This tool retrieves historical revision data from a process model without creating, modifying, deleting, or executing anything. It is a simple read operation that returns information about past versions of a model. The blast radius of misuse is minimal—an AI could view revision history it shouldn't, but no data would be altered or systems affected.

From the tool's definition Tool name 'signavio_get_model_revisions' and description 'Get all revisions of a model' indicate a retrieval operation with no side effects. The 'get' verb and 'Get' action confirm this is a query-only operation.

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

POLICY

How to control signavio_get_model_revisions

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_get_model_revisions:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "signavio_get_model_revisions": {}
  }
}

signavio_get_model_revisions is read-only, so it stays allowed — but 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.

CAP THIS TOOL →

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
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Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about signavio_get_model_revisions

What does the signavio_get_model_revisions tool do? +

Get all revisions of a model. It is categorised as a Read tool in the Signavio MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on signavio_get_model_revisions? +

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

signavio_get_model_revisions is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit signavio_get_model_revisions? +

Yes. Add a rate_limit block to the signavio_get_model_revisions 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_get_model_revisions completely? +

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

signavio_get_model_revisions 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 →