Attach a URL link to a specific row in a Smartsheet sheet. Creates a hyperlink attachment that appears in the row
AI agents use smartsheet_attach_url_to_row to create or update resources in Smartsheet MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Smartsheet MCP Server environment.
This tool creates or modifies data (adds a hyperlink attachment to a row) reversibly. The attachment can be removed or replaced, so it is not destructive. No code execution or financial transactions are involved. It fits the Write category: a tool that creates or modifies data reversibly. Severity is low because misuse would only add unwanted hyperlinks to rows, which are easily undone.
From the tool's definition Tool description states it 'Attach[es] a URL link' and 'Creates a hyperlink attachment' — these are write operations that create or modify data in Smartsheet rows without deleting or executing external code.
Attacks that exploit this kind of access
Attach a URL link to a specific row in a Smartsheet sheet. Creates a hyperlink attachment that appears in the row. It is categorised as a Write tool in the Smartsheet MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Smartsheet MCP Server MCP server in PolicyLayer and add a rule for smartsheet_attach_url_to_row: 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 Smartsheet MCP Server. Nothing to install.
smartsheet_attach_url_to_row 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 smartsheet_attach_url_to_row 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 smartsheet_attach_url_to_row. 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.
smartsheet_attach_url_to_row is provided by the Smartsheet MCP Server MCP server (prmbr42-bot/smartsheet-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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