Low Risk

list_calls

List Gong calls with optional date filtering. Returns minimal call metadata (ID, title, date, duration). Use get_call_summary for details or get_call_transcript for full transcript.

Part of the Gongio server.

list_calls is read-only, but an agent in a loop can still rack up calls and cost. PolicyLayer caps every call before it runs. Live in minutes.

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AI agents call list_calls to retrieve information from Gongio without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.

Even though list_calls only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.

Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_calls": {}
  }
}

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Get this rule live on your own Gongio server in minutes. PolicyLayer enforces it on every call, before it runs.

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These attack patterns abuse exactly the kind of access list_calls gives an agent. Each links to the full case and the policy that stops it:

Browse the full MCP Attack Database →

Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so list_calls only ever does what you allow.

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Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.

What does the list_calls tool do? +

List Gong calls with optional date filtering. Returns minimal call metadata (ID, title, date, duration). Use get_call_summary for details or get_call_transcript for full transcript.. It is categorised as a Read tool in the Gongio MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_calls? +

Register the Gongio MCP server in PolicyLayer and add a rule for 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 Gongio. Nothing to install.

What risk level is list_calls? +

list_calls is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_calls? +

Yes. Add a rate_limit block to the 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.

How do I block list_calls completely? +

Set action: deny in the PolicyLayer policy for 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.

What MCP server provides list_calls? +

list_calls is provided by the Gongio MCP server (gongio-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Gongio tool call.

Deterministic rules across all 12 Gongio tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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