# grant_role

Grant a TIP-20 role to an address. Requires DEFAULT_ADMIN_ROLE on the token.

Agent View of the PolicyLayer registry record for `grant_role`. HTML page: https://policylayer.com/tools/arome3-tempo-mcp/grant-role

## Facts

- Tool: `grant_role`
- Server: Tempo (`arome3/tempo-mcp`) — https://policylayer.com/tools/arome3-tempo-mcp.md
- Homepage: https://github.com/arome3/tempo-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": "grant_role",
    "arguments": {}
  }
}
```

## Why grant_role is rated Medium

This tool grants privileged roles on a financial/stablecoin smart contract. While technically a 'write' operation (modifying access control state), the blast radius is critical: granting roles could allow an attacker to mint tokens, bypass compliance checks, blacklist/whitelist addresses, or perform other high-impact operations on the Tempo stablecoin system.

From the tool's own definition: "Grant a TIP-20 role to an address. Requires DEFAULT_ADMIN_ROLE on the token."

## Use case

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

## Recommended policy (PolicyLayer)

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

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

## Other tools on Tempo (60)

- `burn_blocked_tokens` — Destructive — https://policylayer.com/tools/arome3-tempo-mcp/burn-blocked-tokens.md
- `burn_tokens` — Destructive — https://policylayer.com/tools/arome3-tempo-mcp/burn-tokens.md
- `remove_fee_liquidity` — Destructive — https://policylayer.com/tools/arome3-tempo-mcp/remove-fee-liquidity.md
- `remove_from_whitelist` — Destructive — https://policylayer.com/tools/arome3-tempo-mcp/remove-from-whitelist.md
- `renounce_role` — Destructive — https://policylayer.com/tools/arome3-tempo-mcp/renounce-role.md
- `revoke_access_key` — Destructive — https://policylayer.com/tools/arome3-tempo-mcp/revoke-access-key.md
- `revoke_role` — Destructive — https://policylayer.com/tools/arome3-tempo-mcp/revoke-role.md
- `unpause_token` — Execute — https://policylayer.com/tools/arome3-tempo-mcp/unpause-token.md
- `add_fee_liquidity` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/add-fee-liquidity.md
- `batch_payments` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/batch-payments.md
- `cancel_order` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/cancel-order.md
- `cancel_scheduled_payment` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/cancel-scheduled-payment.md
- `claim_rewards` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/claim-rewards.md
- `create_token` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/create-token.md
- `distribute_rewards` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/distribute-rewards.md
- `mint_tokens` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/mint-tokens.md
- `opt_in_rewards` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/opt-in-rewards.md
- `opt_out_rewards` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/opt-out-rewards.md
- `pause_token` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/pause-token.md
- `place_flip_order` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/place-flip-order.md
- `place_limit_order` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/place-limit-order.md
- `schedule_payment` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/schedule-payment.md
- `send_concurrent_payments` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/send-concurrent-payments.md
- `send_payment` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/send-payment.md
- `send_sponsored_payment` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/send-sponsored-payment.md
- `swap_stablecoins` — Financial — https://policylayer.com/tools/arome3-tempo-mcp/swap-stablecoins.md
- `check_transfer_compliance` — Read — https://policylayer.com/tools/arome3-tempo-mcp/check-transfer-compliance.md
- `estimate_fee_swap` — Read — https://policylayer.com/tools/arome3-tempo-mcp/estimate-fee-swap.md
- `estimate_sponsored_gas` — Read — https://policylayer.com/tools/arome3-tempo-mcp/estimate-sponsored-gas.md
- `get_access_key_info` — Read — https://policylayer.com/tools/arome3-tempo-mcp/get-access-key-info.md
- …and 30 more: https://policylayer.com/tools/arome3-tempo-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=arome3-tempo-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/arome3-tempo-mcp