Search for patterns in a Repomix output file using grep-like functionality with JavaScript RegExp syntax. Returns matching lines with optional context lines around matches.
AI agents call grep_repomix_output to retrieve information from Repomix without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs pattern matching and search operations on existing Repomix output files. It retrieves and displays matching content but does not create, modify, delete, or execute anything. The functionality is purely informational—analogous to running grep on a file to find and display text. No data is changed, no commands are executed, and no external operations are triggered.
From the tool's definition Tool description states 'Search for patterns in a Repomix output file' and 'Returns matching lines with optional context lines around matches'.
Documented attack patterns abuse exactly the kind of access grep_repomix_output gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Repomix, and nothing reaches the server without passing your rules. This is the rule we recommend for grep_repomix_output:
{
"version": "1",
"default": "deny",
"tools": {
"grep_repomix_output": {}
}
}grep_repomix_output is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Search for patterns in a Repomix output file using grep-like functionality with JavaScript RegExp syntax. Returns matching lines with optional context lines around matches. It is categorised as a Read tool in the Repomix MCP Server, which means it retrieves data without modifying state.
Register the Repomix MCP server in PolicyLayer and add a rule for grep_repomix_output: 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 Repomix. Nothing to install.
grep_repomix_output 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 grep_repomix_output 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 grep_repomix_output. 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.
grep_repomix_output is provided by the Repomix MCP server (yamadashy/repomix). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 8 Repomix tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
8 Repomix tools catalogued and risk-classified — across an index of 42,500+ MCP servers.