Create a rectangle on the specified page (defaults to active page in InDesign UI)
AI agents use create_rectangle to create or update resources in InDesign UXP MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your InDesign UXP MCP Server environment.
The tool creates a new rectangle shape object in an InDesign document. This is a reversible modification that adds content to a design, fitting the Write category. Severity is low because: (1) the action is easily undoable, (2) it only adds a basic shape with no complex side effects, (3) it does not delete, execute external code, move money, or trigger irreversible changes.
From the tool's definition Tool name is 'create_rectangle' and description states it will 'Create a rectangle on the specified page'. This is a creation action that modifies the document by adding a new graphical object, but the change is fully reversible (can be undone or deleted).
Documented attack patterns abuse exactly the kind of access create_rectangle gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and InDesign UXP MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for create_rectangle:
{
"version": "1",
"default": "deny",
"tools": {
"create_rectangle": {
"limits": [
{
"counter": "create_rectangle_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_rectangle 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.
Free to start. No card required.
Create a rectangle on the specified page (defaults to active page in InDesign UI). It is categorised as a Write tool in the InDesign UXP MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the InDesign UXP MCP Server MCP server in PolicyLayer and add a rule for create_rectangle: 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 InDesign UXP MCP Server. Nothing to install.
create_rectangle is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_rectangle 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.
Set action: deny in the PolicyLayer policy for create_rectangle. 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.
create_rectangle is provided by the InDesign UXP MCP Server MCP server (theloniuser/indesign-uxp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 135 InDesign UXP MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
135 InDesign UXP MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.