List contracts that implement a specific trait
AI agents call list_contracts_by_trait 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.
This tool retrieves or queries information about contracts matching specific criteria. It performs no mutations, deletions, or financial operations. The verb 'list' and the passive information retrieval nature of the operation clearly place it in the Read category. Severity is low as misuse would only result in information disclosure, not irreversible changes or financial harm.
From the tool's definition Tool name 'list_contracts_by_trait' and description 'List contracts that implement a specific trait' indicate a query/retrieval operation with no side effects.
Attacks that exploit this kind of access
List contracts that implement a specific trait. It is categorised as a Read tool in the Stacks AI MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Stacks AI MCP Server MCP server in PolicyLayer and add a rule for list_contracts_by_trait: 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.
list_contracts_by_trait 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 list_contracts_by_trait 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 list_contracts_by_trait. 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.
list_contracts_by_trait 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.
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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