Get historical TVL data for a specific blockchain.
AI agents call defi_get_chain_tvl to retrieve information from BNB Chain MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries historical Total Value Locked (TVL) data, a read-only operation that does not create, modify, delete, or execute any state changes on the blockchain or external systems. No financial transactions, code execution, or destructive operations are involved.
From the tool's definition Tool name contains 'get' and description states 'Get historical TVL data for a specific blockchain' — indicates data retrieval with no side effects or modifications.
Documented attack patterns abuse exactly the kind of access defi_get_chain_tvl gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and BNB Chain MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for defi_get_chain_tvl:
{
"version": "1",
"default": "deny",
"tools": {
"defi_get_chain_tvl": {}
}
}defi_get_chain_tvl is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Get historical TVL data for a specific blockchain. It is categorised as a Read tool in the BNB Chain MCP MCP Server, which means it retrieves data without modifying state.
Register the BNB Chain MCP server in PolicyLayer and add a rule for defi_get_chain_tvl: 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 BNB Chain MCP. Nothing to install.
defi_get_chain_tvl is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the defi_get_chain_tvl 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 defi_get_chain_tvl. 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.
defi_get_chain_tvl is provided by the BNB Chain MCP server (nirholas/bnbchain-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 1240 BNB Chain MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
1240 BNB Chain MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.