format_sheet
Make an exported sheet readable: bold the header row, FREEZE it so it stays visible while scrolling, and auto-size the columns so nothing is cut off. Worth calling right after create_sheet — a raw export with unsized columns and a header that scrolls away is the difference between a spreadsheet s...
This record as markdown: /tools/hermoso/format-sheet.md
What format_sheet does on Hermoso
AI agents call format_sheet to retrieve information from Hermoso without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why format_sheet is rated Low
Even though format_sheet only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs format_sheet safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Hermoso, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For format_sheet, this is the rule to start with:
format_sheet is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Hermoso, apply this rule, and every format_sheet call is checked against it from then on.
Questions about format_sheet
Make an exported sheet readable: bold the header row, FREEZE it so it stays visible while scrolling, and auto-size the columns so nothing is cut off. Worth calling right after create_sheet — a raw export with unsized columns and a header that scrolls away is the difference between a spreadsheet someone reads and one they close. Changes no cell VALUE, so it is never gated. The defaults do all three on the first tab; pass. It is categorised as a Read tool in the Hermoso MCP Server, which means it retrieves data without modifying state.
Register the Hermoso MCP server in PolicyLayer and add a rule for format_sheet: 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 Hermoso. Nothing to install.
format_sheet 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 format_sheet 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 format_sheet. 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.
format_sheet is provided by the Hermoso MCP server (https://app.hermoso.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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