Create a new character style
AI agents use create_character_style to create or update resources in Indesign — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Indesign environment.
Creating a character style is a write operation that modifies document metadata/assets reversibly. It does not execute arbitrary code, delete data, move money, or trigger external operations with unpredictable effects.
From the tool's definition Tool name is 'create_character_style' and description states 'Create a new character style' — this creates a new style definition within an InDesign document, which is a reversible modification.
Documented attack patterns abuse exactly the kind of access create_character_style gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Indesign, and nothing reaches the server without passing your rules. This is the rule we recommend for create_character_style:
{
"version": "1",
"default": "deny",
"tools": {
"create_character_style": {
"limits": [
{
"counter": "create_character_style_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_character_style 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 new character style. It is categorised as a Write tool in the Indesign MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Indesign MCP server in PolicyLayer and add a rule for create_character_style: 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. Nothing to install.
create_character_style 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_character_style 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_character_style. 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_character_style is provided by the Indesign MCP server (lucdesign/indesign-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Indesign, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
36 Indesign tools catalogued and risk-classified — across an index of 43,000+ MCP servers.