fizzy_update_step · Fizzy Do MCP: Risk & Policy

WHAT IT DOES

What fizzy_update_step does on Fizzy Do MCP

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

WHY IT NEEDS A POLICY

Why fizzy_update_step needs a policy

This tool modifies task workflow steps reversibly—a core Write operation. The severity is medium because careless updates could disrupt project workflows or lose step details, but the action is reversible (can be corrected by subsequent updates). It lacks the destructive finality of deletion, the code execution risk of Execute tools, or financial impact, making Write the appropriate category.

From the tool's definition Tool name 'fizzy_update_step' and description 'Update a step on a card' indicate modification of existing data within a task management system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

fizzy_update_step Rate-limited

fizzy_update_step 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": {
    "fizzy_update_step": {
      "limits": [
        {
          "counter": "fizzy_update_step_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Fizzy Do MCP, so you can run agents against it safely.

FAQ

Questions about fizzy_update_step

What does the fizzy_update_step tool do? +

Update a step on a card. It is categorised as a Write tool in the Fizzy Do MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on fizzy_update_step? +

Register the Fizzy Do MCP server in PolicyLayer and add a rule for fizzy_update_step: 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 Fizzy Do MCP. Nothing to install.

What risk level is fizzy_update_step? +

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

Can I rate-limit fizzy_update_step? +

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

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

fizzy_update_step is provided by the Fizzy Do MCP server (ryanyogan/fizzy-do-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.