reference.select_frames
Rank decodable image references by deterministic quality signals for human review.
This record as markdown: /tools/visionmcp/reference.select-frames.md
What reference.select_frames does on Visionmcp
AI agents call reference.select_frames to retrieve information from Visionmcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why reference.select_frames is rated Low
This tool performs selection and ranking of image references based on quality metrics. It returns analyzed data for human review but does not modify, delete, execute external operations, or commit financial transactions. The operation is deterministic and has no side effects on the underlying data or system state, making it a pure Read category operation with low severity.
From the tool's definition Tool description states it "Rank[s] decodable image references by deterministic quality signals for human review" — a ranking/query operation that retrieves and organizes existing data without modification.
Attacks that exploit this kind of access
The rule that runs reference.select_frames safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Visionmcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For reference.select_frames, this is the rule to start with:
reference.select_frames is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Visionmcp, apply this rule, and every reference.select_frames call is checked against it from then on.
Questions about reference.select_frames
Rank decodable image references by deterministic quality signals for human review. It is categorised as a Read tool in the Visionmcp MCP Server, which means it retrieves data without modifying state.
Register the Vision MCP server in PolicyLayer and add a rule for reference.select_frames: 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 Visionmcp. Nothing to install.
reference.select_frames 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 reference.select_frames 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 reference.select_frames. 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.
reference.select_frames is provided by the Vision MCP server (joshuahickscorp/visionmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on Vision, and thousands of servers like it.
This server
Across the catalogue