AI agents call get_fee_estimate to retrieve information from Kaspa MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries network fee information to inform transaction decisions. It has no side effects, does not modify data, and does not trigger financial transactions or code execution. It is purely informational (Read category). Severity is low because misuse poses minimal risk — an agent could only receive incorrect fee estimates, which would not cause irreversible harm.
From the tool's definition Tool name is 'get_fee_estimate' and description states 'Get current fee estimates from the Kaspa network' — this retrieves network data without modifying state or executing transactions.
Attacks that exploit this kind of access
Get current fee estimates from the Kaspa network. It is categorised as a Read tool in the Kaspa MCP MCP Server, which means it retrieves data without modifying state.
Register the Kaspa MCP server in PolicyLayer and add a rule for get_fee_estimate: 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 Kaspa MCP. Nothing to install.
get_fee_estimate 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_fee_estimate 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_fee_estimate. 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_fee_estimate is provided by the Kaspa MCP server (kasanova-io/kaspa-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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