compare_images

Compare two images and find differences

SERVERPercepta MCP Server SOURCE0x-hewm/percepta-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/0x-hewm-percepta-mcp/compare-images.md

WHAT IT DOES

What compare_images does on Percepta MCP Server

AI agents call compare_images to retrieve information from Percepta MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why compare_images is rated Low

This tool performs image analysis and comparison to identify visual differences. It retrieves and processes information from existing images without creating, modifying, deleting, or executing any operations. The action is purely observational and analytical, making it a Read category tool with low severity since misuse would only result in unintended information disclosure or analysis, not harmful side effects.

From the tool's definition Tool name 'compare_images' and description 'Compare two images and find differences' indicate a comparison/analysis operation with no data modification, deletion, or execution of external operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs compare_images safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Percepta MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For compare_images, this is the rule to start with:

compare_images Allowed

compare_images is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "compare_images": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Percepta MCP Server, apply this rule, and every compare_images call is checked against it from then on.

FAQ

Questions about compare_images

What does the compare_images tool do? +

Compare two images and find differences. It is categorised as a Read tool in the Percepta MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on compare_images? +

Register the Percepta MCP Server MCP server in PolicyLayer and add a rule for compare_images: 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 Percepta MCP Server. Nothing to install.

What risk level is compare_images? +

compare_images is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit compare_images? +

Yes. Add a rate_limit block to the compare_images 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.

How do I block compare_images completely? +

Set action: deny in the PolicyLayer policy for compare_images. 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.

What MCP server provides compare_images? +

compare_images is provided by the Percepta MCP Server MCP server (0x-hewm/percepta-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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