vision.index.similar
Find cross-format exact and near entries for one indexed artifact.
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What vision.index.similar does on Visionmcp
AI agents call vision.index.similar 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 vision.index.similar is rated Low
The tool performs a search/lookup function ('Find') across indexed artifacts to locate similar entries. This is a read-only operation with no side effects, no code execution, no data modification, and no destructive capability. The only input is specifying which artifact to search against, and the output is a list of matches.
From the tool's definition Tool description states 'Find cross-format exact and near entries for one indexed artifact' — this is a query/search operation that retrieves similar indexed entries without modifying or deleting data.
Attacks that exploit this kind of access
The rule that runs vision.index.similar 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 vision.index.similar, this is the rule to start with:
vision.index.similar 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 vision.index.similar call is checked against it from then on.
Questions about vision.index.similar
Find cross-format exact and near entries for one indexed artifact. 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 vision.index.similar: 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.
vision.index.similar 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 vision.index.similar 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 vision.index.similar. 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.
vision.index.similar 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.
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