EditDefinition · Fledgling MCP: Risk & Policy

WHAT IT DOES

What EditDefinition does on Fledgling

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

WHY IT NEEDS A POLICY

Why EditDefinition needs a policy

An AI agent can call EditDefinition faster than any human can review — one bad instruction and it creates or modifies resources in Fledgling by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

EditDefinition Rate-limited

EditDefinition 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": {
    "EditDefinition": {
      "limits": [
        {
          "counter": "editdefinition_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 Fledgling, so you can run agents against it safely.

FAQ

Questions about EditDefinition

What does the EditDefinition tool do? +

Replace a definition's body by name. It is categorised as a Write tool in the Fledgling MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on EditDefinition? +

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

What risk level is EditDefinition? +

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

Can I rate-limit EditDefinition? +

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

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

EditDefinition is provided by the Fledgling MCP server (teaguesterling/fledgling). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.