wallet_switch_account

THE RISK

Medium Risk

Why wallet_switch_account needs a policy

Switching the active account modifies the session/application state by changing which account is used for signing transactions and balance queries. This is a reversible state change (you can switch back), making it a Write operation.

From the tool's definition Switch the active wallet account by nickname or index. The active account is used for signing and balance queries.

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

POLICY

How to control wallet_switch_account

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

policy.json

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

wallet_switch_account 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.

Create a free account and register Algorand MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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All 172 Algorand MCP tools →

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Go deeper

Govern customer-ops agents → PII redaction, approval on external messages, and no-bulk-delete rules on the records agents change.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →
PolicyLayer vs alternatives → How deterministic, per-call MCP policy compares with gateways, identity layers, and authorisation platforms.

FAQ

Questions about wallet_switch_account

What does the wallet_switch_account tool do? +

Switch the active wallet account by nickname or index. The active account is used for signing and balance queries. It is categorised as a Write tool in the Algorand MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on wallet_switch_account? +

Register the Algorand MCP server in PolicyLayer and add a rule for wallet_switch_account: 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 Algorand MCP. Nothing to install.

What risk level is wallet_switch_account? +

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

Can I rate-limit wallet_switch_account? +

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

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

wallet_switch_account is provided by the Algorand MCP server (goplausible/algorand-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Algorand MCP tool call.

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

CHECK YOUR STACK →