AI agents call search_files to retrieve information from MCP Notes without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs pattern-based searching and retrieval of files within a notes directory. It queries existing data without creating, modifying, deleting, or executing any operations. The search functionality is inherently a read operation with minimal security risk—it cannot alter data or trigger external side effects.
From the tool's definition Tool name 'search_files' and description 'Recursively search for files and directories matching a pattern' indicates read-only retrieval operations with no modification or side effects.
Attacks that exploit this kind of access
Recursively search for files and directories matching a pattern in your notes directory. It is categorised as a Read tool in the MCP Notes MCP Server, which means it retrieves data without modifying state.
Register the MCP Notes MCP server in PolicyLayer and add a rule for search_files: 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 MCP Notes. Nothing to install.
search_files 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_files 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_files. 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_files is provided by the MCP Notes MCP server (mikeysrecipes/mcp-notes). 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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