delete_subscription

THE RISK

Critical Risk

Why delete_subscription needs a policy

Deleting feed subscriptions is an irreversible action that removes user data permanently. Once deleted, the subscription and any associated metadata are lost. This meets the Destructive category definition: 'irreversibly deletes or overwrites data, or actions that cannot be undone.' Severity is high because an agent could inadvertently remove many subscriptions if given broad instruction, affecting the user's…

From the tool's definition Tool name 'delete_subscription' with description 'Deletes one or more feed subscriptions' uses the verb 'deletes' which indicates irreversible removal of data.

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

POLICY

How to control delete_subscription

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

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "delete_subscription"
  ]
}

delete_subscription disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

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

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More RSS MCP Server tools

Destructive delete_folder Deletes a folder. This does not delete the feeds within the folder. Write cancel_article_sharing Cancels sharing for a specific article. Write remove_tag_from_all_articles Removes a tag from all articles that have it. Write remove_tag_from_item Removes a specific tag from an article. Write share_article Marks a specific article as a shared item. Write add_subscription Adds a new feed subscription. Write add_tag_to_item Adds a single tag to a specific article. Write add_tags_to_item Adds multiple tags to a specific article.

All 34 RSS MCP Server tools →

Destructive tools on other servers

Android Forensics ADB MCP Server create_full_backup 0xarchive web3_revoke_key Frida Game Hacking MCP clear_scan cPanel MCP Server clear_spam_box

Go deeper

Critical-risk tools in RSS MCP Server → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about delete_subscription

What does the delete_subscription tool do? +

Deletes one or more feed subscriptions. It is categorised as a Destructive tool in the RSS MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on delete_subscription? +

Register the RSS MCP Server MCP server in PolicyLayer and add a rule for delete_subscription: 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 RSS MCP Server. Nothing to install.

What risk level is delete_subscription? +

delete_subscription is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit delete_subscription? +

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

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

delete_subscription is provided by the RSS MCP Server MCP server (xueli-sherryli/rss-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every RSS MCP Server tool call.

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

CHECK YOUR STACK →