User Layer-1 identity: who the user is, voice rules, contact info, core values. Use
AI agents call identity 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 tool retrieves or queries stored personal identity data (name, contact info, values, voice rules). The description contains no language suggesting mutation, deletion, or external execution (no verbs like 'update', 'create', 'delete', 'execute', or 'delete'). The truncated description ('Use') does not clarify write or execute capability, but the primary function is clearly informational.
From the tool's definition Tool description states 'User Layer-1 identity: who the user is, voice rules, contact info, core values. Use' — explicitly a retrieval of identity and personal information with no modification capability indicated.
Attacks that exploit this kind of access
User Layer-1 identity: who the user is, voice rules, contact info, core values. Use. 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 identity: 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.
identity 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 identity 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 identity. 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.
identity 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.
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