List custom conversions defined on the ad account, including the matching rule, event type, and last-fired timestamp. Custom conversions are derived from pixel events plus URL/event-parameter rules.
AI agents call meta.custom_conversions.list to retrieve information from Ads without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves and queries existing custom conversion configuration data from a Meta ads account without modifying, deleting, or executing any actions. It has no side effects beyond reading metadata about pixel events and conversion rules.
From the tool's definition Tool name contains 'list' and description states 'List custom conversions defined on the ad account, including the matching rule, event type, and last-fired timestamp.' This is a data retrieval operation with no mutation capability.
Attacks that exploit this kind of access
List custom conversions defined on the ad account, including the matching rule, event type, and last-fired timestamp. Custom conversions are derived from pixel events plus URL/event-parameter rules. It is categorised as a Read tool in the Ads MCP Server, which means it retrieves data without modifying state.
Register the Ads MCP server in PolicyLayer and add a rule for meta.custom_conversions.list: 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 Ads. Nothing to install.
meta.custom_conversions.list 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 meta.custom_conversions.list 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 meta.custom_conversions.list. 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.
meta.custom_conversions.list is provided by the Ads MCP server (manlikemuneeb/ads-mcp). 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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