clear-replay-buffer

Clear the replay buffer for a channel

SERVERFrontmcp SOURCEagentfront/frontmcp

Critical RISK CLASS

Category Destructive

Parameters 00 required

Recommended Hiddensee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/frontmcp/clear-replay-buffer.md

WHAT IT DOES

What clear-replay-buffer does on Frontmcp

AI agents call clear-replay-buffer to permanently remove resources in Frontmcp, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

RISK

Why clear-replay-buffer is rated Critical

Clearing a replay buffer removes historical data that cannot be recovered. This is a destructive operation as it irreversibly deletes or overwrites data. While the blast radius is limited to a specific channel's replay history rather than critical system data, the irreversible nature of data deletion places it in the Destructive category rather than Write.

From the tool's definition Tool name 'clear-replay-buffer' and description 'Clear the replay buffer for a channel' indicate irreversible deletion or clearing of stored data (the replay buffer). The action cannot be undone.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs clear-replay-buffer safely

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

clear-replay-buffer Hidden

clear-replay-buffer is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "clear-replay-buffer"
  ]
}

RESTRICT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Frontmcp, apply this rule, and every clear-replay-buffer call is checked against it from then on.

FAQ

Questions about clear-replay-buffer

What does the clear-replay-buffer tool do? +

Clear the replay buffer for a channel. It is categorised as a Destructive tool in the Frontmcp 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 clear-replay-buffer? +

Register the Front MCP server in PolicyLayer and add a rule for clear-replay-buffer: 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 Frontmcp. Nothing to install.

What risk level is clear-replay-buffer? +

clear-replay-buffer 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 clear-replay-buffer? +

Yes. Add a rate_limit block to the clear-replay-buffer 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 clear-replay-buffer completely? +

Set action: deny in the PolicyLayer policy for clear-replay-buffer. 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 clear-replay-buffer? +

clear-replay-buffer is provided by the Front MCP server (agentfront/frontmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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