contactsAliasRemove

THE RISK

Critical Risk

Why contactsAliasRemove needs a policy

Removing an alias is a destructive operation as it irreversibly deletes the alias association for a contact. While not catastrophic, this action cannot be undone without manually re-adding the alias, and misuse by an AI agent could cause loss of contact identification data.

From the tool's definition Removes alias for a contact

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

POLICY

How to control contactsAliasRemove

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

policy.json

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

contactsAliasRemove 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 Telegram 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 Telegram MCP Server tools

Destructive groupsMembersRemove Removes members from a group. Destructive groupsLeave Leaves a group chat or channel. Destructive groupsInviteLinkRevoke Revokes the primary invite link for a group. Write contactsTagsRemove Removes tags from a contact. Write autoTagChannels Auto-tags channels based on title, username, and cached metadata. Write groupsJoin Joins a group using an invite link or code. Write mediaDownload Downloads media from a message to a local file. Write contactsAliasSet Sets an alias for a contact.

All 38 Telegram 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 Telegram 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 contactsAliasRemove

What does the contactsAliasRemove tool do? +

Removes alias for a contact. It is categorised as a Destructive tool in the Telegram 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 contactsAliasRemove? +

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

What risk level is contactsAliasRemove? +

contactsAliasRemove 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 contactsAliasRemove? +

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

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

contactsAliasRemove is provided by the Telegram MCP Server MCP server (kfastov/tgcli). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Telegram MCP Server tool call.

Start from Telegram 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 →