Audit a directory for peer divergence - functions that break a call pattern their siblings across the codebase follow (peers calling X also call Y, this one doesn
AI agents call find_divergence to retrieve information from Scantool - File Scanner MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and analyzes code structure information to identify divergence patterns in function calls. It has no capability to modify, delete, or execute code - it only reads and examines existing source code to report findings. The blast radius of misuse is minimal since the worst outcome would be incorrect analysis results without any side effects on the codebase.
From the tool's definition Tool performs analysis and auditing of code patterns without modifying data. The description indicates it 'audits a directory for peer divergence' and identifies functions that deviate from calling patterns - purely analytical/detection functionality.
Attacks that exploit this kind of access
Audit a directory for peer divergence - functions that break a call pattern their siblings across the codebase follow (peers calling X also call Y, this one doesn. It is categorised as a Read tool in the Scantool - File Scanner MCP MCP Server, which means it retrieves data without modifying state.
Register the Scantool - File Scanner MCP server in PolicyLayer and add a rule for find_divergence: 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 Scantool - File Scanner MCP. Nothing to install.
find_divergence 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 find_divergence 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 find_divergence. 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.
find_divergence is provided by the Scantool - File Scanner MCP server (mariusei/file-scanner-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
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