retell_update_chat_agent · Retell AI MCP Server MCP

WHAT IT DOES

What retell_update_chat_agent does on Retell AI MCP Server

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

WHY IT NEEDS A POLICY

Why retell_update_chat_agent needs a policy

This tool modifies an existing chat agent's properties or settings, which is a reversible write operation. While it could affect customer interactions if misconfigured by an agent, the change is not destructive (agent can be updated again) and does not involve financial transactions or code execution.

From the tool's definition Tool name contains 'update' and description states 'Update a chat agent', indicating modification of existing agent configuration data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

retell_update_chat_agent Rate-limited

retell_update_chat_agent 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": {
    "retell_update_chat_agent": {
      "limits": [
        {
          "counter": "retell_update_chat_agent_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Retell AI MCP Server, so you can run agents against it safely.

FAQ

Questions about retell_update_chat_agent

What does the retell_update_chat_agent tool do? +

Update a chat agent. It is categorised as a Write tool in the Retell AI MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on retell_update_chat_agent? +

Register the Retell AI MCP Server MCP server in PolicyLayer and add a rule for retell_update_chat_agent: 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 Retell AI MCP Server. Nothing to install.

What risk level is retell_update_chat_agent? +

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

Can I rate-limit retell_update_chat_agent? +

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

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

retell_update_chat_agent is provided by the Retell AI MCP Server MCP server (itsanamune/retellsimp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.