Revoke approval for an ERC20 token from a spender (sets allowance to 0)
Part of the Leandrogavidia Vechain Mcp Server server.
Free to start. No card required.
AI agents may call revoke_token_approval_evm to permanently remove or destroy resources in Leandrogavidia Vechain Mcp Server. Without a policy, an autonomous agent could delete critical data in a loop with no way to undo the damage. PolicyLayer blocks destructive tools by default and requires explicit human approval before enabling them.
Without a policy, an AI agent could call revoke_token_approval_evm in a loop, permanently destroying resources in Leandrogavidia Vechain Mcp Server. There is no undo for destructive operations. PolicyLayer blocks this tool by default and only allows it when a human explicitly approves the action.
Destructive tools permanently remove data. Block by default. Only enable with explicit approval workflows.
{
"version": "1",
"default": "deny",
"hide": [
"revoke_token_approval_evm"
]
}See the full Leandrogavidia Vechain Mcp Server policy for all 20 tools.
These attack patterns abuse exactly the kind of access revoke_token_approval_evm gives an agent. Each links to the full case and the policy that stops it:
Other destructive tools across the catalogue. The same approach applies to each: deny by default, or require human approval.
Revoke approval for an ERC20 token from a spender (sets allowance to 0). It is categorised as a Destructive tool in the Leandrogavidia Vechain Mcp Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Leandrogavidia Vechain Mcp Server MCP server in PolicyLayer and add a rule for revoke_token_approval_evm: 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 Leandrogavidia Vechain Mcp Server. Nothing to install.
revoke_token_approval_evm is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the revoke_token_approval_evm 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.
Set action: deny in the PolicyLayer policy for revoke_token_approval_evm. 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.
revoke_token_approval_evm is provided by the Leandrogavidia Vechain Mcp Server MCP server (https://server.smithery.ai/@leandrogavidia/vechain-mcp-server/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 20 Leandrogavidia Vechain Mcp Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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