compare_reports

Classify new, resolved, unchanged, and changed-or-uncertain findings in two audit reports.

SERVERA11y Agent SOURCE@a11y-agent/mcp

Low RISK CLASS

Category Read

Parameters 22 required

Recommended Allowedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/a11y-agent-mcp/compare-reports.md

WHAT IT DOES

What compare_reports does on A11y Agent

AI agents call compare_reports to retrieve information from A11y Agent 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
`after`	object	Yes
`before`	object	Yes

Parameters from the server's own tool schema.

RISK

Why compare_reports is rated Low

Even though compare_reports only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Risk signalsHigh parameter count (108 properties)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs compare_reports safely

PolicyLayer is an MCP gateway: it sits between your AI agents and A11y Agent, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For compare_reports, this is the rule to start with:

compare_reports Allowed

compare_reports 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_reports": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect A11y Agent, apply this rule, and every compare_reports call is checked against it from then on.

FAQ

Questions about compare_reports

What does the compare_reports tool do? +

Classify new, resolved, unchanged, and changed-or-uncertain findings in two audit reports. It is categorised as a Read tool in the A11y Agent MCP Server, which means it retrieves data without modifying state.

What parameters does compare_reports accept? +

compare_reports accepts 2 parameters: after, before. Required: after, before. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on compare_reports? +

Register the A11y Agent MCP server in PolicyLayer and add a rule for compare_reports: 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 A11y Agent. Nothing to install.

What risk level is compare_reports? +

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

Can I rate-limit compare_reports? +

Yes. Add a rate_limit block to the compare_reports 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_reports completely? +

Set action: deny in the PolicyLayer policy for compare_reports. 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_reports? +

compare_reports is provided by the A11y Agent MCP server (@a11y-agent/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on A11y Agent, and thousands of servers like it.

This server

All 6 A11y Agent tools →

Across the catalogue

The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →