Search a file for text or regex patterns and return line numbers, content, and surrounding context. Useful for finding exact locations before making edits with edit_file_lines. Features: - Simple text search with optional case sensitivity - Regular expression support with multiline mode - Whole w...
AI agents call search_file to retrieve information from Edit File Lines MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool purely retrieves and queries file content to locate patterns. It returns search results without any side effects—no data is created, modified, deleted, or executed. It is explicitly designed as a helper to locate content before making edits with other tools, confirming its read-only nature.
From the tool's definition Tool description states it "Search a file for text or regex patterns and return line numbers, content, and surrounding context." The capabilities listed (simple text search, regex support, context lines, returning results) are all read-only operations with no…
Documented attack patterns abuse exactly the kind of access search_file gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Edit File Lines MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search_file:
{
"version": "1",
"default": "deny",
"tools": {
"search_file": {}
}
}search_file is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Search a file for text or regex patterns and return line numbers, content, and surrounding context. Useful for finding exact locations before making edits with edit_file_lines. Features: - Simple text search with optional case sensitivity - Regular expression support with multiline mode - Whole word matching option - Configurable context lines - Returns line numbers, content, and surrounding context. It is categorised as a Read tool in the Edit File Lines MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Edit File Lines MCP Server MCP server in PolicyLayer and add a rule for search_file: 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 Edit File Lines MCP Server. Nothing to install.
search_file 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 search_file 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 search_file. 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.
search_file is provided by the Edit File Lines MCP Server MCP server (oakenai/mcp-edit-file-lines). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 4 Edit File Lines MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4 Edit File Lines MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.