rotate_api_key

SERVERFathom Fyi SOURCE0xhashy/fathom-fyi

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade C, identity unverified Pull the record →

This record as markdown: /tools/0xhashy-fathom-fyi/rotate-api-key.md

WHAT IT DOES

What rotate_api_key does on Fathom Fyi

AI agents use rotate_api_key to create or update resources in Fathom Fyi, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Fathom Fyi environment.

RISK

Why rotate_api_key is rated Medium

This tool creates a new API key (Write action) and deactivates the old one (reversible modification of access credentials). While it modifies security credentials, it does not expose financial data, execute trades, or permanently destroy information.

From the tool's definition Rotate your Fathom API key. Generates a new key, deactivates the old one, and returns the new key.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs rotate_api_key safely

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

rotate_api_key Rate-limited

rotate_api_key stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "rotate_api_key": {
      "limits": [
        {
          "counter": "rotate_api_key_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about rotate_api_key

What does the rotate_api_key tool do? +

Rotate your Fathom API key. Generates a new key, deactivates the old one, and returns the new key. The user must update their MCP config with the new key. Max 3 rotations per day. Requires Starter tier or above. It is categorised as a Write tool in the Fathom Fyi MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on rotate_api_key? +

Register the Fathom Fyi MCP server in PolicyLayer and add a rule for rotate_api_key: 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 Fathom Fyi. Nothing to install.

What risk level is rotate_api_key? +

rotate_api_key is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit rotate_api_key? +

Yes. Add a rate_limit block to the rotate_api_key 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 rotate_api_key completely? +

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

rotate_api_key is provided by the Fathom Fyi MCP server (0xhashy/fathom-fyi). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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