get_supported_markets

List all available JustLend lending markets (jTokens) with their addresses and underlying assets.

SERVERJustlend SOURCEjustlend/mcp-server-justlend

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/justlend-mcp-server-justlend/get-supported-markets.md

WHAT IT DOES

What get_supported_markets does on Justlend

AI agents call get_supported_markets to retrieve information from Justlend without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get_supported_markets is rated Low

This tool retrieves and displays information about available markets on JustLend DAO. It performs no data modification, execution of code, deletion, or financial transactions. It is a pure informational read operation with minimal security risk.

From the tool's definition Tool name 'get_supported_markets' and description 'List all available JustLend lending markets' indicate a simple query/retrieval operation with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_supported_markets safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Justlend, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_supported_markets, this is the rule to start with:

get_supported_markets Allowed

get_supported_markets is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_supported_markets": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Justlend, apply this rule, and every get_supported_markets call is checked against it from then on.

FAQ

Questions about get_supported_markets

What does the get_supported_markets tool do? +

List all available JustLend lending markets (jTokens) with their addresses and underlying assets. It is categorised as a Read tool in the Justlend MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_supported_markets? +

Register the Justlend MCP server in PolicyLayer and add a rule for get_supported_markets: 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 Justlend. Nothing to install.

What risk level is get_supported_markets? +

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

Can I rate-limit get_supported_markets? +

Yes. Add a rate_limit block to the get_supported_markets 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 get_supported_markets completely? +

Set action: deny in the PolicyLayer policy for get_supported_markets. 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 get_supported_markets? +

get_supported_markets is provided by the Justlend MCP server (justlend/mcp-server-justlend). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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