Precision frame extraction — grab ONE frame at each specified timestamp from a video URL. Use this as the companion to the transcription tools (get_tweet, get_youtube_transcript, get_instagram_post) to verify on-screen content at timestamps where transcription is unreliable. Triggers: (1) the tra...
AI agents call get_video_frames_at to retrieve information from Media without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Even though get_video_frames_at only reads data, uncontrolled read access leaks sensitive information and racks up API costs — an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
Precision frame extraction — grab ONE frame at each specified timestamp from a video URL. Use this as the companion to the transcription tools (get_tweet, get_youtube_transcript, get_instagram_post) to verify on-screen content at timestamps where transcription is unreliable. Triggers: (1) the transcript reported Uncertainty zones — call this with the. It is categorised as a Read tool in the Media MCP Server, which means it retrieves data without modifying state.
Register the Media MCP server in PolicyLayer and add a rule for get_video_frames_at: 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 Media. Nothing to install.
get_video_frames_at 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_video_frames_at 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_video_frames_at. 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_video_frames_at is provided by the Media MCP server (woosal1337/media-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.