Apply formatting to a range of cells (bold, italic, font size, background color, text color). Colors use RGB floats 0-1.
AI agents use google_sheets_format_range to create or update resources in Sage MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Sage MCP environment.
This tool modifies the visual formatting of cells in a Google Sheet, which is a reversible write operation. It does not delete data or execute code, but it does alter the state of a spreadsheet. Misuse could affect many cells across shared documents, but the changes are reversible, placing it in the Write category at medium severity.
From the tool's definition Apply formatting to a range of cells (bold, italic, font size, background color, text color)
Documented attack patterns abuse exactly the kind of access google_sheets_format_range gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Sage MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for google_sheets_format_range:
{
"version": "1",
"default": "deny",
"tools": {
"google_sheets_format_range": {
"limits": [
{
"counter": "google_sheets_format_range_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}google_sheets_format_range stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Apply formatting to a range of cells (bold, italic, font size, background color, text color). Colors use RGB floats 0-1. It is categorised as a Write tool in the Sage MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Sage MCP server in PolicyLayer and add a rule for google_sheets_format_range: 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 Sage MCP. Nothing to install.
google_sheets_format_range is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the google_sheets_format_range 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 google_sheets_format_range. 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.
google_sheets_format_range is provided by the Sage MCP server (sagemcp/sagemcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 359 Sage MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
359 Sage MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.