changedetection_create_watch

Add a new URL to watch. Change Detection will begin polling it on its default schedule.

SERVERCrow SOURCEkh0pper/crow

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/kh0pper-crow/changedetection-create-watch.md

WHAT IT DOES

What changedetection_create_watch does on Crow

AI agents use changedetection_create_watch to create or update resources in Crow, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Crow environment.

RISK

Why changedetection_create_watch is rated Medium

This tool creates and persists new data (a watch configuration for URL monitoring) rather than merely retrieving information. While it doesn't delete, overwrite existing data, or execute arbitrary code, it does add a new entity to the system's monitoring list, making it a Write operation.

From the tool's definition Tool description explicitly states 'Add a new URL to watch', which creates a new monitoring record that persists in the system. This is a create operation that modifies the system's persistent state by adding a new watch configuration.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs changedetection_create_watch safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Crow, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For changedetection_create_watch, this is the rule to start with:

changedetection_create_watch Rate-limited

changedetection_create_watch 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": {
    "changedetection_create_watch": {
      "limits": [
        {
          "counter": "changedetection_create_watch_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Crow, apply this rule, and every changedetection_create_watch call is checked against it from then on.

FAQ

Questions about changedetection_create_watch

What does the changedetection_create_watch tool do? +

Add a new URL to watch. Change Detection will begin polling it on its default schedule. It is categorised as a Write tool in the Crow MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on changedetection_create_watch? +

Register the Crow MCP server in PolicyLayer and add a rule for changedetection_create_watch: 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 Crow. Nothing to install.

What risk level is changedetection_create_watch? +

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

Can I rate-limit changedetection_create_watch? +

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

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

changedetection_create_watch is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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