search_users

Search Gelbooru users by name or name pattern.

SERVERGelbooru MCP SOURCEcitronlegacy/gelbooru-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade C, identity unverified Pull the record →

This record as markdown: /tools/citronlegacy-gelbooru-mcp/search-users.md

WHAT IT DOES

What search_users does on Gelbooru MCP

AI agents call search_users to retrieve information from Gelbooru MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why search_users is rated Low

This tool retrieves user information from Gelbooru based on search criteria. It performs a query operation that returns data without creating, modifying, deleting, or executing any external operations. The action is read-only and poses minimal risk even if an AI agent misuses it—the worst case would be discovering user information that may already be public on the platform.

From the tool's definition Tool description: 'Search Gelbooru users by name or name pattern.' The verb 'search' combined with read-only query of user information indicates data retrieval with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs search_users safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Gelbooru MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For search_users, this is the rule to start with:

search_users Allowed

search_users is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "search_users": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Gelbooru MCP, apply this rule, and every search_users call is checked against it from then on.

FAQ

Questions about search_users

What does the search_users tool do? +

Search Gelbooru users by name or name pattern. It is categorised as a Read tool in the Gelbooru MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on search_users? +

Register the Gelbooru MCP server in PolicyLayer and add a rule for search_users: 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 Gelbooru MCP. Nothing to install.

What risk level is search_users? +

search_users is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit search_users? +

Yes. Add a rate_limit block to the search_users 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.

How do I block search_users completely? +

Set action: deny in the PolicyLayer policy for search_users. 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.

What MCP server provides search_users? +

search_users is provided by the Gelbooru MCP server (citronlegacy/gelbooru-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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