Lists all cross-sheet references defined for a sheet
AI agents call list_cross_sheet_references to retrieve information from Smartsheet MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns information about cross-sheet references without creating, modifying, deleting, or executing any operations. It is a straightforward read-only data retrieval function typical of list/get operations. The low severity reflects minimal blast radius—even if misused by an AI agent, it only exposes existing reference metadata without enabling destructive or financial harm.
From the tool's definition Tool name 'list_cross_sheet_references' and description 'Lists all cross-sheet references defined for a sheet' indicate a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Lists all cross-sheet references defined for a sheet. It is categorised as a Read tool in the Smartsheet MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Smartsheet MCP Server MCP server in PolicyLayer and add a rule for list_cross_sheet_references: 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.
list_cross_sheet_references 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 list_cross_sheet_references 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 list_cross_sheet_references. 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.
list_cross_sheet_references is provided by the Smartsheet MCP Server MCP server (thomaswtwrt/smar-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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