Fetch multiple notes by id in a single call (up to 20 ids).
AI agents call note_batch_get to retrieve information from MCP Object-Authz Lab without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves data without side effects, placing it in the Read category. Severity is medium rather than low because: (1) the server is explicitly 'vulnerable-by-design' for learning BOLA/IDOR bugs, meaning this tool likely has authorization flaws that could expose sensitive multi-tenant data; (2) batch retrieval of up to 20 notes amplifies the blast radius of a potential IDOR vulnerability compared to…
From the tool's definition Tool name 'note_batch_get' and description 'Fetch multiple notes by id' indicate data retrieval with no modification. The description explicitly states this retrieves/queries data ('Fetch multiple notes').
Attacks that exploit this kind of access
Fetch multiple notes by id in a single call (up to 20 ids). It is categorised as a Read tool in the MCP Object-Authz Lab MCP Server, which means it retrieves data without modifying state.
Register the MCP Object-Authz Lab MCP server in PolicyLayer and add a rule for note_batch_get: 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 Object-Authz Lab. Nothing to install.
note_batch_get 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 note_batch_get 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 note_batch_get. 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.
note_batch_get is provided by the MCP Object-Authz Lab MCP server (wrg-11/mcp-objauthz-lab). 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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