visual_compare
A read tool on the Looking Glass MCP server.
This record as markdown: /tools/io-github-sahib-sawhney-wh-looking-glass-mcp/visual-compare.md
What visual_compare does on Looking Glass
AI agents call visual_compare to retrieve information from Looking Glass without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
name | string | Yes | Baseline name to compare against |
Parameters from the server's own tool schema.
Why visual_compare is rated Low
Visual comparison is a passive retrieval operation without modifying data or triggering external actions. Given the empty description and the pattern of analysis/diagnostic tools on this server, Read is most likely. Low severity due to minimal blast radius from misuse.
From the tool's definition Tool name 'visual_compare' suggests comparison of visual/UI elements with no side effects. Empty description limits confidence. Sibling tools like 'browser_analyze_page' and 'browser_diagnose' indicate this server's Read-category operations.
Attacks that exploit this kind of access
The rule that runs visual_compare safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Looking Glass, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For visual_compare, this is the rule to start with:
visual_compare 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 Looking Glass, apply this rule, and every visual_compare call is checked against it from then on.
Questions about visual_compare
visual_compare is a read tool on the Looking Glass MCP server. It is categorised as a Read tool in the Looking Glass MCP Server, which means it retrieves data without modifying state.
visual_compare accepts 1 parameter: name. Required: name. The full parameter table on this page comes from the server's own tool schema.
Register the Looking Glass MCP server in PolicyLayer and add a rule for visual_compare: 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 Looking Glass. Nothing to install.
visual_compare 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 visual_compare 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 visual_compare. 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.
visual_compare is provided by the Looking Glass MCP server (looking-glass-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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