Browse the most popular tools on the SettleGrid marketplace with pricing and availability info. Each result includes cost-per-call, total invocations, and whether the tool requires an API key. Optionally filter by category. Use this to find callable tools before invoking them with call_tool.
Part of the Settlegrid Discovery server.
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AI agents call list_marketplace_tools to retrieve information from Settlegrid Discovery without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though list_marketplace_tools only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"list_marketplace_tools": {}
}
}See the full Settlegrid Discovery policy for all 6 tools.
These attack patterns abuse exactly the kind of access list_marketplace_tools gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Browse the most popular tools on the SettleGrid marketplace with pricing and availability info. Each result includes cost-per-call, total invocations, and whether the tool requires an API key. Optionally filter by category. Use this to find callable tools before invoking them with call_tool.. It is categorised as a Read tool in the Settlegrid Discovery MCP Server, which means it retrieves data without modifying state.
Register the Settlegrid Discovery MCP server in PolicyLayer and add a rule for list_marketplace_tools: 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 Settlegrid Discovery. Nothing to install.
list_marketplace_tools 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_marketplace_tools 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_marketplace_tools. 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_marketplace_tools is provided by the Settlegrid Discovery MCP server (settlegrid/settlegrid-discovery). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 6 Settlegrid Discovery tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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