AI agents call get_funding_rate 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 naming convention and context of sibling tools on a 'market-data MCP server' strongly suggest this retrieves funding rate information (a market metric in crypto derivatives). The 'get_' prefix indicates read-only data retrieval with no side effects.
From the tool's definition Tool named 'get_funding_rate' with no description provided. Naming pattern 'get_*' and sibling tools like 'get_aggregated_ohlc', 'get_coin_details', 'get_chain_tvl_history' indicate retrieval of cryptocurrency market data without modification.
Attacks that exploit this kind of access
get_funding_rate. 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_funding_rate: 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_funding_rate 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_funding_rate 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_funding_rate. 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_funding_rate 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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