Get new messages since timestamp
AI agents call get_thread_updates to retrieve information from Mcp Coordinator without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or reads messages from a coordination thread based on a timestamp parameter. It has no side effects, does not modify data, execute code, delete anything, or move money. It is a simple query/fetch operation consistent with the Read category.
From the tool's definition Tool description: 'Get new messages since timestamp' - this is a retrieval operation that queries existing messages without modification or execution.
Attacks that exploit this kind of access
Get new messages since timestamp. It is categorised as a Read tool in the Mcp Coordinator MCP Server, which means it retrieves data without modifying state.
Register the Mcp Coordinator MCP server in PolicyLayer and add a rule for get_thread_updates: 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 Mcp Coordinator. Nothing to install.
get_thread_updates 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 get_thread_updates 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 get_thread_updates. 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.
get_thread_updates is provided by the Mcp Coordinator MCP server (swoofer/mcp-coordinator). 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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