AI agents call list-file-types to retrieve information from Ripgrep without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns static information about ripgrep's supported file types. It has no side effects, does not modify data, does not execute code, and does not access user files. It is a straightforward informational read operation with minimal security risk.
From the tool's definition Tool name 'list-file-types' and description 'List all supported file types in ripgrep' indicate a query operation that retrieves metadata about ripgrep's capabilities without accessing user files or executing code.
Attacks that exploit this kind of access
List all supported file types in ripgrep. It is categorised as a Read tool in the Ripgrep MCP Server, which means it retrieves data without modifying state.
Register the Ripgrep MCP server in PolicyLayer and add a rule for list-file-types: 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 Ripgrep. Nothing to install.
list-file-types 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 list-file-types 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 list-file-types. 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.
list-file-types is provided by the Ripgrep MCP server (shk1447/ripgrep-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.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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