truncate_text

THE RISK

Low Risk

Why truncate_text needs a policy

This tool only processes text locally by shortening it to fit within a token limit. It does not retrieve data, modify external state, execute code, delete anything, or involve finances. It is a pure text transformation utility with no side effects.

From the tool's definition Truncate text to fit within token limit

Documented attack patterns abuse exactly the kind of access truncate_text gives an agent:

POLICY

How to control truncate_text

PolicyLayer is an MCP gateway — it sits between your AI agents and Web Scraper, and nothing reaches the server without passing your rules. This is the rule we recommend for truncate_text:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "truncate_text": {
      "limits": [
        {
          "counter": "truncate_text_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

truncate_text gets a rate cap, and everything else on the server is denied unless you say otherwise.

Create a free account and register Web Scraper — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about truncate_text

What does the truncate_text tool do? +

Truncate text to fit within token limit. It is categorised as a Other tool in the Web Scraper MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on truncate_text? +

Register the Web Scraper MCP server in PolicyLayer and add a rule for truncate_text: 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 Web Scraper. Nothing to install.

What risk level is truncate_text? +

truncate_text is a Other tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit truncate_text? +

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

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

truncate_text is provided by the Web Scraper MCP server (imyourboyroy/webscrapertoolkit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Web Scraper tool call.

Start from Web Scraper, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →