AI agents call get-prompt to retrieve information from Phoenix without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'get-' prefix strongly suggests a retrieval operation with no side effects. The empty description reduces confidence somewhat, but the sibling tools and server context indicate a read-oriented analytical platform. Classified as Read with low severity since retrieving prompt data poses minimal risk unless the prompts contain sensitive information (which would still be a read operation).
From the tool's definition Tool name 'get-prompt' with empty description. By naming convention, 'get' indicates retrieval. Sibling tools include other 'get-' operations (get-dataset, get-dataset-examples, get-dataset-experiments, get-experiment-by-id) and read-like operations…
Documented attack patterns abuse exactly the kind of access get-prompt gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Phoenix, and nothing reaches the server without passing your rules. This is the rule we recommend for get-prompt:
{
"version": "1",
"default": "deny",
"tools": {
"get-prompt": {}
}
}get-prompt is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get-prompt. It is categorised as a Read tool in the Phoenix MCP Server, which means it retrieves data without modifying state.
Register the Phoenix MCP server in PolicyLayer and add a rule for get-prompt: 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 Phoenix. Nothing to install.
get-prompt 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 get-prompt 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 get-prompt. 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.
get-prompt is provided by the Phoenix MCP server (@Arize-ai/phoenix). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 34 Phoenix tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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34 Phoenix tools catalogued and risk-classified — across an index of 42,500+ MCP servers.