AI agents call prompthub_describe_artifact_format to retrieve information from Prompthub without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves descriptive metadata about artifact format specifications. It performs a read-only query operation with no side effects, no code execution, no data modification, and no destructive capability. The 'describe' action is inherently informational and returns documentation or schema details about artifact structure in the repository.
From the tool's definition Tool name contains 'describe' and description states 'Explain PromptHub ARTIFACTS', indicating it retrieves and explains schema/format information without modifying data.
Attacks that exploit this kind of access
Explain PromptHub ARTIFACTS (generated outputs in the repo. It is categorised as a Read tool in the Prompthub MCP Server, which means it retrieves data without modifying state.
Register the Prompthub MCP server in PolicyLayer and add a rule for prompthub_describe_artifact_format: 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 Prompthub. Nothing to install.
prompthub_describe_artifact_format 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 prompthub_describe_artifact_format 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 prompthub_describe_artifact_format. 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.
prompthub_describe_artifact_format is provided by the Prompthub MCP server (lionelhao/prompthub-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.
Teams ship this data inside their own products. See what a licence covers →