insert_horizontal_rule · Google Docs MCP Server MCP

WHAT IT DOES

What insert_horizontal_rule does on Google Docs MCP Server

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

WHY IT NEEDS A POLICY

Why insert_horizontal_rule needs a policy

This tool creates or modifies document content reversibly—characteristic of the Write category. It adds a visual divider element without deleting data or executing external code. Severity is medium because misuse could corrupt document formatting or structure, but the effect is easily undoable and limited in blast radius compared to destructive or execute-level operations.

From the tool's definition Tool inserts a horizontal rule/divider into a Google Doc at a specified index. The action modifies document content by adding a formatting element, which is reversible (can be deleted). Description states 'Insert' which indicates document modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

insert_horizontal_rule Rate-limited

insert_horizontal_rule 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": {
    "insert_horizontal_rule": {
      "limits": [
        {
          "counter": "insert_horizontal_rule_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 Google Docs MCP Server, so you can run agents against it safely.

FAQ

Questions about insert_horizontal_rule

What does the insert_horizontal_rule tool do? +

Insert a horizontal rule (divider line) at the specified index. It is categorised as a Write tool in the Google Docs MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on insert_horizontal_rule? +

Register the Google Docs MCP Server MCP server in PolicyLayer and add a rule for insert_horizontal_rule: 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 Google Docs MCP Server. Nothing to install.

What risk level is insert_horizontal_rule? +

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

Can I rate-limit insert_horizontal_rule? +

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

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

insert_horizontal_rule is provided by the Google Docs MCP Server MCP server (nickweedon/google-docs-mcp-docker). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.