changedetection_list_changes

THE RISK

Low Risk

Why changedetection_list_changes needs a policy

This tool retrieves and lists existing change detection records. It performs a query operation with no side effects, no code execution, no data modification, and no destructive actions. The blast radius of misuse is minimal—an agent could only view historical change data that has already been recorded.

From the tool's definition Tool name 'changedetection_list_changes' and description 'List recent change events across all watches' indicate a retrieval operation that queries historical change data without modifying, deleting, or executing external operations.

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

POLICY

How to control changedetection_list_changes

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "changedetection_list_changes": {}
  }
}

changedetection_list_changes is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

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EXPLORE

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FAQ

Questions about changedetection_list_changes

What does the changedetection_list_changes tool do? +

List recent change events across all watches. Useful for. It is categorised as a Read tool in the Crow MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on changedetection_list_changes? +

Register the Crow MCP server in PolicyLayer and add a rule for changedetection_list_changes: 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_list_changes? +

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

Can I rate-limit changedetection_list_changes? +

Yes. Add a rate_limit block to the changedetection_list_changes 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_list_changes completely? +

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

changedetection_list_changes 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.

Enforce policy on every Crow tool call.

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

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