Validate tags against the taxonomy configuration
AI agents call validate_tags to retrieve information from Obsidian Ai Curator without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs validation (a read-only check) against a configuration. It retrieves and inspects tag data to compare against rules, with no side effects, data modification, code execution, or destructive operations. This is a straightforward Read category tool with low severity risk.
From the tool's definition Tool name is 'validate_tags' and description states it 'Validate tags against the taxonomy configuration' — this is a query/validation operation that checks tags against a schema without modifying data.
Documented attack patterns abuse exactly the kind of access validate_tags gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Obsidian Ai Curator, and nothing reaches the server without passing your rules. This is the rule we recommend for validate_tags:
{
"version": "1",
"default": "deny",
"tools": {
"validate_tags": {}
}
}validate_tags is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Validate tags against the taxonomy configuration. It is categorised as a Read tool in the Obsidian Ai Curator MCP Server, which means it retrieves data without modifying state.
Register the Obsidian Ai Curator MCP server in PolicyLayer and add a rule for validate_tags: 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 Obsidian Ai Curator. Nothing to install.
validate_tags 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 validate_tags 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 validate_tags. 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.
validate_tags is provided by the Obsidian Ai Curator MCP server (nwant/obsidian-ai-curator). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Obsidian Ai Curator, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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27 Obsidian Ai Curator tools catalogued and risk-classified — across an index of 43,000+ MCP servers.