AI agents use session_end to create or update resources in Tages — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Tages environment.
This tool writes data to persistent storage by extracting and saving memories from a session summary. It creates new memory records in the SQLite store. While it ends a session, the primary side effect is writing/creating memory entries, making it a Write operation. Severity is medium because an AI agent could persist incorrect or misleading architectural decisions that affect future sessions.
From the tool's definition End the current session with a summary of what was built, decided, or learned — auto-extracts memories from the summary
Attacks that exploit this kind of access
End the current session with a summary of what was built, decided, or learned — auto-extracts memories from the summary. It is categorised as a Write tool in the Tages MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Tages MCP server in PolicyLayer and add a rule for session_end: 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 Tages. Nothing to install.
session_end is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the session_end 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 session_end. 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.
session_end is provided by the Tages MCP server (ryantlee25-droid/tages). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
session_end is one line of Tages's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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