AI agents call get_notes_by_tag to retrieve information from MCP Bear without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs data retrieval only. It queries notes by tag attribute and returns results without creating, modifying, deleting, or executing any operations. The verb 'get' and the read-only nature of filtering existing data by tag confirm the Read category.
From the tool's definition Tool name is 'get_notes_by_tag' and description states 'Get all notes with a specific tag' — a query operation that retrieves data without modification or side effects.
Attacks that exploit this kind of access
Get all notes with a specific tag. It is categorised as a Read tool in the MCP Bear MCP Server, which means it retrieves data without modifying state.
Register the MCP Bear MCP server in PolicyLayer and add a rule for get_notes_by_tag: 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 MCP Bear. Nothing to install.
get_notes_by_tag 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_notes_by_tag 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_notes_by_tag. 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_notes_by_tag is provided by the MCP Bear MCP server (maxim-ist/mcp-bear). 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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