AI agents call get_protocol_tvl to retrieve information from Coin without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'get_' prefix combined with the server context (cryptocurrency market-data) and similar sibling tools strongly suggests this retrieves protocol TVL metrics without modifying or executing anything. TVL queries are read-only market data operations with no side effects. Confidence is slightly reduced due to the empty description, but the pattern is clear.
From the tool's definition Tool name 'get_protocol_tvl' indicates retrieval of Total Value Locked data for blockchain protocols. Empty description, but naming convention ('get_*') and sibling tools (get_coin_details, get_chain_tvl_history, get_aggregated_ohlc) are all data retrieval…
Attacks that exploit this kind of access
get_protocol_tvl. It is categorised as a Read tool in the Coin MCP Server, which means it retrieves data without modifying state.
Register the Coin MCP server in PolicyLayer and add a rule for get_protocol_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 Coin. Nothing to install.
get_protocol_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 get_protocol_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 get_protocol_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.
get_protocol_tvl is provided by the Coin MCP server (sweetcornna/coin-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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