Explore archival collections hierarchically.
AI agents call na_browse_collection to retrieve information from Nationaal Archief 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 and queries archival collection metadata to enable hierarchical exploration. There is no indication it modifies, deletes, executes code, or triggers external operations. It is a standard information retrieval function appropriate for archival access. Severity is low as misuse would only expose read access to historical records without side effects.
From the tool's definition Tool description states 'Explore archival collections hierarchically' and is part of a server that 'provides access to...for searching, browsing, and retrieving archival records.' The verb 'browse' and 'explore' indicate read-only navigation without…
Attacks that exploit this kind of access
Explore archival collections hierarchically. It is categorised as a Read tool in the Nationaal Archief MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Nationaal Archief MCP Server MCP server in PolicyLayer and add a rule for na_browse_collection: 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 Nationaal Archief MCP Server. Nothing to install.
na_browse_collection 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 na_browse_collection 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 na_browse_collection. 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.
na_browse_collection is provided by the Nationaal Archief MCP Server MCP server (w36zl/na_mcp_server). 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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