Lists all shares for a folder
AI agents call list_folder_shares 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 retrieves and displays sharing permission information for a folder. It performs no modifications, deletions, or execution of external operations. While sharing information could be sensitive, the action itself is purely informational with minimal blast radius if misused by an agent—it would only expose already-existing share data that an authorized user could legitimately view through normal API access.
From the tool's definition Tool name 'list_folder_shares' and description 'Lists all shares for a folder' indicate a retrieval operation with no side effects. The verb 'lists' is a classic Read operation that queries existing data about sharing permissions.
Attacks that exploit this kind of access
Lists all shares for a folder. 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_folder_shares: 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_folder_shares 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_folder_shares 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_folder_shares. 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_folder_shares 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.
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