set_extent · Arcmap MCP: Risk & Policy

WHAT IT DOES

What set_extent does on Arcmap

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

WHY IT NEEDS A POLICY

Why set_extent needs a policy

This tool modifies the view extent of the active data frame in ArcMap, which is a reversible change to the display state. It does not delete data, execute arbitrary code, or move money. It simply repositions/zooms the map view, which is a low-impact write operation.

From the tool's definition 'Encuadra el data frame activo a unas coordenadas [xmin, ymin, xmax, ymax]' — sets/updates the active data frame extent to specified coordinates

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_extent Rate-limited

set_extent 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": {
    "set_extent": {
      "limits": [
        {
          "counter": "set_extent_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 Arcmap, so you can run agents against it safely.

FAQ

Questions about set_extent

What does the set_extent tool do? +

Encuadra el data frame activo a unas coordenadas [xmin, ymin, xmax, ymax] (en el. It is categorised as a Write tool in the Arcmap MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_extent? +

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

What risk level is set_extent? +

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

Can I rate-limit set_extent? +

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

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

set_extent is provided by the Arcmap MCP server (pedralcg/arcmap-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

set_extent is one line of Arcmap's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

Teams ship this data inside their own products. See what a licence covers →