get-headers

Returns the headers from the last request

SERVERMcp Test Servers SOURCEmsfeldstein/mcp-test-servers

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mcp-test-servers/get-headers.md

WHAT IT DOES

What get-headers does on Mcp Test Servers

AI agents call get-headers to retrieve information from Mcp Test Servers without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get-headers is rated Low

This tool retrieves metadata (HTTP headers) from a previous request. It performs a read-only operation with no ability to modify, delete, or execute code. The blast radius is minimal—at worst, an agent gains access to request metadata which may contain information already visible in the HTTP exchange. Classified as Read with low severity.

From the tool's definition Tool name 'get-headers' and description 'Returns the headers from the last request' indicate a retrieval operation that queries data about HTTP request headers with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get-headers safely

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

get-headers Allowed

get-headers 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": {
    "get-headers": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Test Servers, apply this rule, and every get-headers call is checked against it from then on.

FAQ

Questions about get-headers

What does the get-headers tool do? +

Returns the headers from the last request. It is categorised as a Read tool in the Mcp Test Servers MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get-headers? +

Register the Mcp Test Servers MCP server in PolicyLayer and add a rule for get-headers: 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 Mcp Test Servers. Nothing to install.

What risk level is get-headers? +

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

Can I rate-limit get-headers? +

Yes. Add a rate_limit block to the get-headers 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 get-headers completely? +

Set action: deny in the PolicyLayer policy for get-headers. 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 get-headers? +

get-headers is provided by the Mcp Test Servers MCP server (msfeldstein/mcp-test-servers). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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