AI agents use url_shorten to create or update resources in Tools — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Tools environment.
| Parameter | Type | Required | Description |
|---|---|---|---|
url | string | Yes | Long URL to shorten |
code | string | — | Custom short code (3-20 chars, optional) |
Parameters from the server's own tool schema.
This tool creates or modifies data (new short URL mappings) in a reversible manner. While it performs tracking, the primary function is creating new URL mappings in a service, which is a write operation. The severity is low because misuse would only create unnecessary URL mappings or occupy quota, with no destructive, financial, or execution risks. Confidence is high as the tool's purpose is clearly stated.
From the tool's definition Tool creates new short links and returns short URL with click tracking capability. The description explicitly states 'Create a short link' indicating a write operation that creates new records.
Risk signalsAccepts freeform code/query input (code) · Accepts URL/endpoint input (url)
Attacks that exploit this kind of access
Create a short link for any URL. Returns short URL and click tracking. Free: 100 links/day. It is categorised as a Write tool in the Tools MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
url_shorten accepts 2 parameters: url, code. Required: url. The full parameter table on this page comes from the server's own tool schema.
Register the Tools MCP server in PolicyLayer and add a rule for url_shorten: 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 Tools. Nothing to install.
url_shorten 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 url_shorten 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 url_shorten. 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.
url_shorten is provided by the Tools MCP server (https://www.jiebang.site/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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