Show the parameters, path params, and request body shape for one endpoint (by operationId). Call this before mailtarget_call_endpoint to know what to pass.
AI agents call mailtarget_describe_endpoint to retrieve information from Mailtarget without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns information about endpoint specifications. It has no side effects, does not execute operations, and does not create, modify, or delete any data. It is purely informational, used to inspect API endpoint schemas before calling them. This is a classic Read category operation.
From the tool's definition Tool description states 'Show the parameters, path params, and request body shape for one endpoint' — a retrieval operation that provides metadata about API endpoints without executing actions or modifying data.
Attacks that exploit this kind of access
Show the parameters, path params, and request body shape for one endpoint (by operationId). Call this before mailtarget_call_endpoint to know what to pass. It is categorised as a Read tool in the Mailtarget MCP Server, which means it retrieves data without modifying state.
Register the Mailtarget MCP server in PolicyLayer and add a rule for mailtarget_describe_endpoint: 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 Mailtarget. Nothing to install.
mailtarget_describe_endpoint 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 mailtarget_describe_endpoint 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 mailtarget_describe_endpoint. 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.
mailtarget_describe_endpoint is provided by the Mailtarget MCP server (yopie-org/mailtarget). 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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