AI agents call encode_html to retrieve information from IT Tools MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool takes input text and returns HTML-encoded output. It is a stateless, read-only transformation (like a function call) that does not write, execute, or delete anything. Misuse potential is negligible.
From the tool's definition Encode HTML entities — this is a pure text transformation/encoding operation with no side effects, external calls, or data modification.
Documented attack patterns abuse exactly the kind of access encode_html gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and IT Tools MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for encode_html:
{
"version": "1",
"default": "deny",
"tools": {
"encode_html": {}
}
}encode_html is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Encode HTML entities. It is categorised as a Read tool in the IT Tools MCP Server MCP Server, which means it retrieves data without modifying state.
Register the IT Tools MCP Server MCP server in PolicyLayer and add a rule for encode_html: 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 IT Tools MCP Server. Nothing to install.
encode_html 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 encode_html 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 encode_html. 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.
encode_html is provided by the IT Tools MCP Server MCP server (wrenchpilot/it-tools-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from IT Tools MCP 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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119 IT Tools MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.