Check spelling in all files in a folder
AI agents call check_folder to retrieve information from SpellChecker MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and analyzes spelling information across a directory structure. It does not create, modify, delete, or execute code. The operation is purely informational—checking and reporting spelling issues. Even though it scans multiple files, the scope remains a passive read operation with no capability to alter data or trigger external side effects.
From the tool's definition Tool performs spell-checking on folder contents without modifying files. The description states it 'Check[s] spelling in all files in a folder' — a read-only query operation.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Check spelling in all files in a folder. It is categorised as a Read tool in the SpellChecker MCP Server MCP Server, which means it retrieves data without modifying state.
Register the SpellChecker MCP Server MCP server in PolicyLayer and add a rule for check_folder: 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 SpellChecker MCP Server. Nothing to install.
check_folder 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 check_folder 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 check_folder. 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.
check_folder is provided by the SpellChecker MCP Server MCP server (morahan/spellchecker-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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