AI agents call get_cast to retrieve information from Imdb without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves cast data from IMDb, a read-only operation with no side effects, data modification, code execution, or financial implications. The blast radius of misuse is minimal—an agent could at most retrieve excessive amounts of cast data, which poses no security risk.
From the tool's definition Tool name 'get_cast' and description 'Get the cast of a movie from IMDb' indicate retrieval of publicly available movie cast information with no modification, deletion, or execution capability.
Documented attack patterns abuse exactly the kind of access get_cast gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Imdb, and nothing reaches the server without passing your rules. This is the rule we recommend for get_cast:
{
"version": "1",
"default": "deny",
"tools": {
"get_cast": {}
}
}get_cast is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get the cast of a movie from IMDb. It is categorised as a Read tool in the Imdb MCP Server, which means it retrieves data without modifying state.
Register the Imdb MCP server in PolicyLayer and add a rule for get_cast: 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 Imdb. Nothing to install.
get_cast 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_cast 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_cast. 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_cast is provided by the Imdb MCP server (uzaysozen/imdb-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Imdb, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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23 Imdb tools catalogued and risk-classified — across an index of 43,000+ MCP servers.