Search and return a list of Excel files in the configured work directory.
AI agents call list_excel_files_tool to retrieve information from Excel Search MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries the file system to list Excel files but does not modify, delete, or execute any operations. It is a straightforward directory enumeration/search operation that returns information only, making it a Read category risk with low severity.
From the tool's definition Tool description states it 'Search and return a list of Excel files' - a retrieval operation with no side effects. The server description emphasizes 'search, read, and analyze' capabilities, confirming read-only functionality.
Attacks that exploit this kind of access
Search and return a list of Excel files in the configured work directory. It is categorised as a Read tool in the Excel Search MCP MCP Server, which means it retrieves data without modifying state.
Register the Excel Search MCP server in PolicyLayer and add a rule for list_excel_files_tool: 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 Excel Search MCP. Nothing to install.
list_excel_files_tool 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_excel_files_tool 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_excel_files_tool. 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_excel_files_tool is provided by the Excel Search MCP server (msaltnet/excel-search-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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