Query retention data. Shows how many users come back after an initial event.
AI agents call query_retention to retrieve information from Mixpanel 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 existing retention metrics in Mixpanel (users returning after initial events). It retrieves and displays analytical data with no side effects—no creation, modification, deletion, code execution, or financial operations. The blast radius of misuse is minimal; an agent could only over-query or access unauthorized cohorts, but cannot alter state or trigger external operations.
From the tool's definition Tool description states 'Query retention data' — a read-only operation that retrieves analytics metrics without modifying or deleting any underlying data. The verb 'query' and the passive 'shows' indicate data retrieval only.
Attacks that exploit this kind of access
Query retention data. Shows how many users come back after an initial event. It is categorised as a Read tool in the Mixpanel MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Mixpanel MCP Server MCP server in PolicyLayer and add a rule for query_retention: 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 Mixpanel MCP Server. Nothing to install.
query_retention 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 query_retention 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 query_retention. 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.
query_retention is provided by the Mixpanel MCP Server MCP server (t-campbell18/mcp-mixpanel). 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.
Teams ship this data inside their own products. See what a licence covers →