Set character spacing (tracking) for a specific run in a paragraph.
AI agents use set_character_spacing to create or update resources in Docx — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Docx environment.
This tool creates or modifies document formatting reversibly. Character spacing adjustments are non-destructive, can be undone or re-applied, and affect only visual presentation properties of text runs within a paragraph. No data is deleted, no external operations are triggered, and no financial implications exist.
From the tool's definition Tool name and description indicate modification of document formatting properties: 'Set character spacing (tracking) for a specific run in a paragraph' modifies but does not delete or irreversibly alter content.
Documented attack patterns abuse exactly the kind of access set_character_spacing gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Docx, and nothing reaches the server without passing your rules. This is the rule we recommend for set_character_spacing:
{
"version": "1",
"default": "deny",
"tools": {
"set_character_spacing": {
"limits": [
{
"counter": "set_character_spacing_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}set_character_spacing 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.
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Set character spacing (tracking) for a specific run in a paragraph. It is categorised as a Write tool in the Docx MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Docx MCP server in PolicyLayer and add a rule for set_character_spacing: 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 Docx. Nothing to install.
set_character_spacing 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 set_character_spacing 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 set_character_spacing. 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.
set_character_spacing is provided by the Docx MCP server (securityronin/docx-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Docx, 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.
219 Docx tools catalogued and risk-classified — across an index of 43,000+ MCP servers.