AI agents call brief_history to retrieve information from Llama without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves versioning metadata and historical content snapshots. It performs a read-only query with no side effects, no data modification, and no irreversible actions. While it may expose historical information, it does not create, modify, delete, or execute operations. This is a straightforward data retrieval function.
From the tool's definition Tool name 'brief_history' and description 'List the content-version history of a brief block' indicate a retrieval operation that queries historical snapshots without modifying data.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
List the content-version history of a brief block (every overwrite is snapshotted). It is categorised as a Read tool in the Llama MCP Server, which means it retrieves data without modifying state.
Register the Llama MCP server in PolicyLayer and add a rule for brief_history: 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 Llama. Nothing to install.
brief_history 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 brief_history 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 brief_history. 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.
brief_history is provided by the Llama MCP server (llama-ventures/llama-cli). 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 →