AI agents call get_state_brief to retrieve information from Nvim without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves state information from a Neovim session without side effects. While the empty description lowers confidence slightly, the naming pattern and sibling context (all read-only diagnostic/state queries) strongly suggest it queries Neovim's state.
From the tool's definition Tool name 'get_state_brief' indicates inspection/retrieval of Neovim state. Sibling tools like 'get_state', 'get_all_diagnostics', and 'get_buf_diagnostics' confirm this server's Read operations.
Documented attack patterns abuse exactly the kind of access get_state_brief gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Nvim, and nothing reaches the server without passing your rules. This is the rule we recommend for get_state_brief:
{
"version": "1",
"default": "deny",
"tools": {
"get_state_brief": {}
}
}get_state_brief is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_state_brief. It is categorised as a Read tool in the Nvim MCP Server, which means it retrieves data without modifying state.
Register the Nvim MCP server in PolicyLayer and add a rule for get_state_brief: 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 Nvim. Nothing to install.
get_state_brief 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_state_brief 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_state_brief. 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_state_brief is provided by the Nvim MCP server (paulburgess1357/nvim-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 17 Nvim tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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17 Nvim tools catalogued and risk-classified — across an index of 42,500+ MCP servers.