AI agents call sendook_list_threads to retrieve information from Sendook without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'list_' prefix indicates the tool queries and returns existing thread data from the email platform. It does not create, modify, delete, or execute operations. Even if misused, listing threads only exposes information without irreversible consequences or financial impact. Severity is low as the blast radius of accidental enumeration is minimal.
From the tool's definition Tool name 'sendook_list_threads' follows the 'list_*' pattern, which retrieves or queries data without side effects.
Attacks that exploit this kind of access
sendook_list_threads. It is categorised as a Read tool in the Sendook MCP Server, which means it retrieves data without modifying state.
Register the Sendook MCP server in PolicyLayer and add a rule for sendook_list_threads: 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 Sendook. Nothing to install.
sendook_list_threads 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 sendook_list_threads 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 sendook_list_threads. 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.
sendook_list_threads is provided by the Sendook MCP server (streamlinedstartup/sendook-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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