AI agents call filter_videos to retrieve information from Yt Fetch without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool applies filters to existing video data to refine results. Filtering is a read-only query operation that retrieves a subset of data based on criteria. It has no side effects, does not create or modify data, and does not execute code or delete anything.
From the tool's definition Tool description states 'Apply custom filters to a list of videos' - a filtering operation that retrieves or queries data without modifying, deleting, or executing external operations.
Attacks that exploit this kind of access
Apply custom filters to a list of videos. It is categorised as a Read tool in the Yt Fetch MCP Server, which means it retrieves data without modifying state.
Register the Yt Fetch MCP server in PolicyLayer and add a rule for filter_videos: 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 Yt Fetch. Nothing to install.
filter_videos 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 filter_videos 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 filter_videos. 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.
filter_videos is provided by the Yt Fetch MCP server (smith-nathanh/yt-fetch). 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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