Lists all unique leagues in the video library (e.g.
AI agents call list_unique_leagues to retrieve information from Video Metadata MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple data retrieval operation—listing distinct league values from the metadata. It has no capability to modify, delete, or execute code. The operation is idempotent and returns only aggregate metadata. As a read operation with minimal blast radius if misused, the severity is low.
From the tool's definition Tool name 'list_unique_leagues' and description 'Lists all unique leagues in the video library' indicate a read-only query operation that retrieves and returns data without modification or side effects.
Attacks that exploit this kind of access
Lists all unique leagues in the video library (e.g. It is categorised as a Read tool in the Video Metadata MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Video Metadata MCP Server MCP server in PolicyLayer and add a rule for list_unique_leagues: 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 Video Metadata MCP Server. Nothing to install.
list_unique_leagues 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 list_unique_leagues 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 list_unique_leagues. 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.
list_unique_leagues is provided by the Video Metadata MCP Server MCP server (stich-studios/metadata-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.
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