Allows you to add temporary access to the master (highest-quality) version of the asset in MP4 format. A URL will be created that can be used to download the master version for 24 hours. After 24 hours Master Access will revert to "none". This master version is not optimized for web and not meant...
Part of the Mux MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents use update_master_access_video_assets to create or modify resources in Mux. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call update_master_access_video_assets repeatedly, creating or modifying resources faster than any human could review. Intercept's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Mux.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
tools:
update_master_access_video_assets:
rules:
- action: allow
rate_limit:
max: 30
window: 60See the full Mux policy for all 98 tools.
Agents calling write-class tools like update_master_access_video_assets have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Write risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.
Allows you to add temporary access to the master (highest-quality) version of the asset in MP4 format. A URL will be created that can be used to download the master version for 24 hours. After 24 hours Master Access will revert to "none". This master version is not optimized for web and not meant to be streamed, only downloaded for purposes like archiving or editing the video offline.. It is categorised as a Write tool in the Mux MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Add a rule in your Intercept YAML policy under the tools section for update_master_access_video_assets. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Mux MCP server.
update_master_access_video_assets is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the update_master_access_video_assets rule in your Intercept 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 Intercept policy for update_master_access_video_assets. 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.
update_master_access_video_assets is provided by the Mux MCP server (@mux/mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept