update_cells
A write tool on the Mcp Google Docs MCP server.
This record as markdown: /tools/dev-ithitchhiker-mcp-google-docs/update-cells.md
What update_cells does on Mcp Google Docs
AI agents use update_cells to create or update resources in Mcp Google Docs, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Google Docs environment.
Why update_cells is rated Medium
This tool creates or modifies data in a reversible manner (cells can be edited again). It does not delete data permanently, execute arbitrary code, or involve financial transactions. The medium severity reflects that uncontrolled cell updates could corrupt important spreadsheet data, but changes can typically be undone via version history. Empty description lowers confidence slightly from 0.9 to 0.85.
From the tool's definition Tool name 'update_cells' indicates modification of cell data in Google Sheets. Sibling tool 'batch_update_cells' confirms this is a data modification operation. The server description explicitly mentions 'manipulating Google Spreadsheet' which includes writes.
Attacks that exploit this kind of access
The rule that runs update_cells safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Google Docs, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For update_cells, this is the rule to start with:
update_cells 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Google Docs, apply this rule, and every update_cells call is checked against it from then on.
Questions about update_cells
update_cells is a write tool on the Mcp Google Docs MCP server. It is categorised as a Write tool in the Mcp Google Docs MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mcp Google Docs MCP server in PolicyLayer and add a rule for update_cells: 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 Mcp Google Docs. Nothing to install.
update_cells 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 update_cells 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 update_cells. 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.
update_cells is provided by the Mcp Google Docs MCP server (dev-ithitchhiker/mcp-google-docs). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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