# modify_sub_api_key

Modify sub API key permissions.

Agent View of the PolicyLayer registry record for `modify_sub_api_key`. HTML page: https://policylayer.com/tools/johnnywic-bybit-mcp/modify-sub-api-key

## Facts

- Tool: `modify_sub_api_key`
- Server: Bybit (`johnnywic/bybit-mcp`) — https://policylayer.com/tools/johnnywic-bybit-mcp.md
- Homepage: https://github.com/JohnnyWic/bybit-mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "modify_sub_api_key",
    "arguments": {}
  }
}
```

## Why modify_sub_api_key is rated Medium

This tool modifies (Write category) API key permissions, which affects authentication and authorization scope. While reversible, misuse could grant an attacker elevated permissions to control trading, account access, or data retrieval across the exchange platform.

From the tool's own definition: "Tool name 'modify_sub_api_key' and description 'Modify sub API key permissions' indicate reversible modification of API key access controls."

## Use case

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

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Bybit:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "modify_sub_api_key": {
      "limits": [
        {
          "counter": "modify_sub_api_key_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Bybit (244)

- `batch_cancel_order` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/batch-cancel-order.md
- `cancel_all_orders` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/cancel-all-orders.md
- `cancel_all_rfq_quotes` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/cancel-all-rfq-quotes.md
- `cancel_all_rfqs` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/cancel-all-rfqs.md
- `cancel_all_spread_orders` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/cancel-all-spread-orders.md
- `cancel_new_crypto_loan_fixed_borrow` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/cancel-new-crypto-loan-fixed-borrow.md
- `cancel_new_crypto_loan_fixed_supply` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/cancel-new-crypto-loan-fixed-supply.md
- `cancel_order` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/cancel-order.md
- `cancel_rfq` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/cancel-rfq.md
- `cancel_rfq_quote` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/cancel-rfq-quote.md
- `cancel_spread_order` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/cancel-spread-order.md
- `cancel_withdrawal` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/cancel-withdrawal.md
- `delete_master_api_key` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/delete-master-api-key.md
- `delete_sub_api_key` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/delete-sub-api-key.md
- `delete_sub_uid` — Destructive — https://policylayer.com/tools/johnnywic-bybit-mcp/delete-sub-uid.md
- `execute_hedge_arbitrage_strategy` — Execute — https://policylayer.com/tools/johnnywic-bybit-mcp/execute-hedge-arbitrage-strategy.md
- `freeze_sub_uid` — Execute — https://policylayer.com/tools/johnnywic-bybit-mcp/freeze-sub-uid.md
- `pre_check_order` — Execute — https://policylayer.com/tools/johnnywic-bybit-mcp/pre-check-order.md
- `reset_mmp` — Execute — https://policylayer.com/tools/johnnywic-bybit-mcp/reset-mmp.md
- `set_leverage` — Execute — https://policylayer.com/tools/johnnywic-bybit-mcp/set-leverage.md
- `accept_rfq_non_lp_quote` — Financial — https://policylayer.com/tools/johnnywic-bybit-mcp/accept-rfq-non-lp-quote.md
- `amend_order` — Financial — https://policylayer.com/tools/johnnywic-bybit-mcp/amend-order.md
- `batch_place_order` — Financial — https://policylayer.com/tools/johnnywic-bybit-mcp/batch-place-order.md
- `confirm_convert_quote` — Financial — https://policylayer.com/tools/johnnywic-bybit-mcp/confirm-convert-quote.md
- `confirm_fiat_quote` — Financial — https://policylayer.com/tools/johnnywic-bybit-mcp/confirm-fiat-quote.md
- `confirm_small_balance_quote` — Financial — https://policylayer.com/tools/johnnywic-bybit-mcp/confirm-small-balance-quote.md
- `create_internal_transfer` — Financial — https://policylayer.com/tools/johnnywic-bybit-mcp/create-internal-transfer.md
- `create_rfq_quote` — Financial — https://policylayer.com/tools/johnnywic-bybit-mcp/create-rfq-quote.md
- `create_universal_transfer` — Financial — https://policylayer.com/tools/johnnywic-bybit-mcp/create-universal-transfer.md
- `crypto_loan_adjust_ltv` — Financial — https://policylayer.com/tools/johnnywic-bybit-mcp/crypto-loan-adjust-ltv.md
- …and 214 more: https://policylayer.com/tools/johnnywic-bybit-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=johnnywic-bybit-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/johnnywic-bybit-mcp