estimate_contract_call_fee · Stacks AI MCP Server MCP

WHAT IT DOES

What estimate_contract_call_fee does on Stacks AI MCP Server

AI agents call estimate_contract_call_fee to retrieve information from Stacks AI MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why estimate_contract_call_fee needs a policy

This tool performs a read-only estimation operation. It queries fee data for informational purposes only and does not execute transactions, modify blockchain state, move funds, or trigger irreversible actions. The word 'estimate' confirms it is a predictive/informational call with no side effects.

From the tool's definition Tool name 'estimate_contract_call_fee' and description 'Estimate fees for a contract call transaction' indicate retrieval of fee information without modifying state or executing transactions.

Attacks that exploit this kind of access

Questions about estimate_contract_call_fee

What does the estimate_contract_call_fee tool do? +

Estimate fees for a contract call transaction. It is categorised as a Read tool in the Stacks AI MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on estimate_contract_call_fee? +

Register the Stacks AI MCP Server MCP server in PolicyLayer and add a rule for estimate_contract_call_fee: 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 Stacks AI MCP Server. Nothing to install.

What risk level is estimate_contract_call_fee? +

estimate_contract_call_fee is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit estimate_contract_call_fee? +

Yes. Add a rate_limit block to the estimate_contract_call_fee 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.

How do I block estimate_contract_call_fee completely? +

Set action: deny in the PolicyLayer policy for estimate_contract_call_fee. 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.

What MCP server provides estimate_contract_call_fee? +

estimate_contract_call_fee is provided by the Stacks AI MCP Server MCP server (stack-ai-mcp/stacks-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.