search_by_category | PolicyLayer

WHAT IT DOES

What search_by_category does on OpenTK Model Context Protocol Server

AI agents call search_by_category to retrieve information from OpenTK Model Context Protocol Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why search_by_category needs a policy

This tool retrieves or queries documents from Dutch parliamentary data based on category filters. It has no side effects—it does not create, modify, delete, or execute operations. The search functionality is a classic Read operation, consistent with the broader server design which provides 'access to' public parliamentary information.

From the tool's definition Tool description states it 'Performs a search for documents of a certain category' - a retrieval operation with no modification or deletion capability. The server is described as providing 'access to' parliamentary data, consistent with read-only querying.

Documented attack patterns abuse exactly the kind of access search_by_category gives an agent:

POLICY

How to control search_by_category

PolicyLayer is an MCP gateway — it sits between your AI agents and OpenTK Model Context Protocol Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search_by_category:

policy.json

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

search_by_category is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register OpenTK Model Context Protocol Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

More OpenTK Model Context Protocol Server tools

Read analyze_document_relevance Performs intelligent pre-analysis of a parliamentary document to determine its relevance W Read birthdays_today Lists all Members of Parliament celebrating their birthday today, including their names, p Read find_party_in_document Searches for all occurrences of a political party within a parliamentary document and retu Read find_person_in_document Searches for all occurrences of a person Read get_committee_details Retrieves detailed information about a specific parliamentary committee, including its mem Read get_committees Retrieves a list of all parliamentary committees with their IDs, names, and URLs. The resp Read get_document_content Retrieves the content of a parliamentary document (PDF or DOCX). This tool supports three Read get_document_details Retrieves metadata about a parliamentary document in a structured JSON format, without dow

All 17 OpenTK Model Context Protocol Server tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about search_by_category

What does the search_by_category tool do? +

Performs a search for documents of a certain category, such as questions (. It is categorised as a Read tool in the OpenTK Model Context Protocol Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on search_by_category? +

Register the OpenTK Model Context Protocol Server MCP server in PolicyLayer and add a rule for search_by_category: 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 OpenTK Model Context Protocol Server. Nothing to install.

What risk level is search_by_category? +

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

Can I rate-limit search_by_category? +

Yes. Add a rate_limit block to the search_by_category 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_by_category completely? +

Set action: deny in the PolicyLayer policy for search_by_category. 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_by_category? +

search_by_category is provided by the OpenTK Model Context Protocol Server MCP server (r-huijts/opentk-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every OpenTK Model Context Protocol Server tool call.

Start from OpenTK Model Context Protocol Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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17 OpenTK Model Context Protocol Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.