List and filter calls with pagination support. Can filter by agent, status, time range, and more.
AI agents call retell_list_calls to retrieve information from Retell AI MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves existing call records with filtering and pagination capabilities. It performs a read-only operation that retrieves data without creating, modifying, or deleting any resources. The pagination and filtering parameters are all non-destructive query parameters. There is no indication of execution, modification, or deletion of data.
From the tool's definition Tool name 'retell_list_calls' and description 'List and filter calls with pagination support' indicate a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
List and filter calls with pagination support. Can filter by agent, status, time range, and more. It is categorised as a Read tool in the Retell AI MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Retell AI MCP Server MCP server in PolicyLayer and add a rule for retell_list_calls: 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.
retell_list_calls is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the retell_list_calls 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.
Set action: deny in the PolicyLayer policy for retell_list_calls. 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.
retell_list_calls 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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