AI agents call search_wiki to retrieve information from Lark without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries wiki documents without creating, modifying, or deleting any data. It has no side effects beyond returning search results. The operation is reversible and safe, making it a Read category tool with low severity risk.
From the tool's definition Tool description explicitly states 'Search documents in Feishu Wiki by keywords'. The verb 'search' combined with 'by keywords' indicates a query operation with no data modification or deletion.
Attacks that exploit this kind of access
Search documents in Feishu Wiki by keywords. It is categorised as a Read tool in the Lark MCP Server, which means it retrieves data without modifying state.
Register the Lark MCP server in PolicyLayer and add a rule for search_wiki: 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 Lark. Nothing to install.
search_wiki 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 search_wiki 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 search_wiki. 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.
search_wiki is provided by the Lark MCP server (lovelts/lark-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.
Teams ship this data inside their own products. See what a licence covers →