get_account_summary

THE RISK

Low Risk

Why get_account_summary needs a policy

This tool retrieves and queries account statistics and summary data. It performs no modifications to data, executes no external operations, and incurs no financial effects. It is a straightforward read operation with minimal blast radius if misused—an AI agent could only obtain information about the account, not alter its state or access sensitive operations.

From the tool's definition Tool name 'get_account_summary' and description 'Get overall account summary with statistics' indicate retrieval of aggregated account information without modification or side effects.

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

POLICY

How to control get_account_summary

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

policy.json

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

get_account_summary 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 Fastmail MCP 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 →

Free to start. No card required.

EXPLORE

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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 get_account_summary

What does the get_account_summary tool do? +

Get overall account summary with statistics. It is categorised as a Read tool in the Fastmail MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_account_summary? +

Register the Fastmail MCP Server MCP server in PolicyLayer and add a rule for get_account_summary: 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 Fastmail MCP Server. Nothing to install.

What risk level is get_account_summary? +

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

Can I rate-limit get_account_summary? +

Yes. Add a rate_limit block to the get_account_summary 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_account_summary completely? +

Set action: deny in the PolicyLayer policy for get_account_summary. 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_account_summary? +

get_account_summary is provided by the Fastmail MCP Server MCP server (madllama25/fastmail-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Fastmail MCP Server tool call.

Start from Fastmail MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →