Who am I neglecting? Returns personal contacts sorted by oldest last-interaction. Filter by minimum days since contact, relationship type, or tags.
AI agents call last_seen to retrieve information from Personal Brain without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a straightforward read operation that queries and retrieves contact interaction history from the personal database. It performs sorting and filtering but makes no changes to data, executes no external operations, and has no destructive or financial implications. The blast radius if misused by an AI agent is minimal—it exposes contact metadata but cannot modify, delete, or act upon that data.
From the tool's definition Tool explicitly 'Returns personal contacts sorted by oldest last-interaction' with filtering options. No modification, deletion, or execution described. Pure data retrieval operation.
Attacks that exploit this kind of access
Who am I neglecting? Returns personal contacts sorted by oldest last-interaction. Filter by minimum days since contact, relationship type, or tags. It is categorised as a Read tool in the Personal Brain MCP Server, which means it retrieves data without modifying state.
Register the Personal Brain MCP server in PolicyLayer and add a rule for last_seen: 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 Personal Brain. Nothing to install.
last_seen 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 last_seen 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 last_seen. 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.
last_seen is provided by the Personal Brain MCP server (phantomts/personal-brain-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 →