AI agents use add_color_scale to create or update resources in Office Editor — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Office Editor environment.
This tool creates or modifies formatting (color scales, likely in conditional formatting contexts based on sibling 'add_conditional_formatting' tool). Formatting changes are reversible edits to document content, fitting the Write category. Severity is medium because while it modifies documents, the changes are non-destructive and localized to visual styling.
From the tool's definition Tool name 'add_color_scale' combined with sibling tools like 'add_conditional_formatting', 'add_data_bar', and context of an office document editor server indicates this modifies document formatting/styling.
Documented attack patterns abuse exactly the kind of access add_color_scale gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Office Editor, and nothing reaches the server without passing your rules. This is the rule we recommend for add_color_scale:
{
"version": "1",
"default": "deny",
"tools": {
"add_color_scale": {
"limits": [
{
"counter": "add_color_scale_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}add_color_scale 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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add_color_scale. It is categorised as a Write tool in the Office Editor MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Office Editor MCP server in PolicyLayer and add a rule for add_color_scale: 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 Office Editor. Nothing to install.
add_color_scale 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 add_color_scale 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 add_color_scale. 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.
add_color_scale is provided by the Office Editor MCP server (thewdy/office-editor-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 88 Office Editor tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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88 Office Editor tools catalogued and risk-classified — across an index of 42,500+ MCP servers.