AI agents call search_bear_notes to retrieve information from Bear Notes MCP Server 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 notes from a local note-taking application (Bear App) based on search criteria. Search operations are inherently read-only with no side effects—they do not create, modify, delete, or execute any actions. The worst-case misuse would be information disclosure of the user's notes, which is a low-severity risk since the notes are already stored locally on the user's system.
From the tool's definition Tool name 'search_bear_notes' and description 'Search Bear App notes' indicates a query operation that retrieves data from the Bear App without modifying it.
Documented attack patterns abuse exactly the kind of access search_bear_notes gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Bear Notes MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search_bear_notes:
{
"version": "1",
"default": "deny",
"tools": {
"search_bear_notes": {}
}
}search_bear_notes is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Search Bear App notes. It is categorised as a Read tool in the Bear Notes MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Bear Notes MCP Server MCP server in PolicyLayer and add a rule for search_bear_notes: 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 Bear Notes MCP Server. Nothing to install.
search_bear_notes 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 search_bear_notes 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 search_bear_notes. 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.
search_bear_notes is provided by the Bear Notes MCP Server MCP server (netologist/mcp-bear-notes). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Bear Notes MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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7 Bear Notes MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.