Find the cheapest models that meet specific capability requirements.
AI agents call find_cheapest_capable to retrieve information from Whichmodel-mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool searches and returns model recommendations based on cost and capability criteria. It has no side effects—it neither executes code, modifies data, deletes anything, nor commits financial transactions. It is purely informational, similar to a search or comparison function. Severity is low because misuse would only return advisory data, not cause harmful external actions.
From the tool's definition Tool name 'find_cheapest_capable' and description 'Find the cheapest models that meet specific capability requirements' indicate a query/lookup operation that retrieves pricing and capability data without modifying anything.
Attacks that exploit this kind of access
Find the cheapest models that meet specific capability requirements. It is categorised as a Read tool in the Whichmodel-mcp MCP Server, which means it retrieves data without modifying state.
Register the Whichmodel- MCP server in PolicyLayer and add a rule for find_cheapest_capable: 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 Whichmodel-mcp. Nothing to install.
find_cheapest_capable 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 find_cheapest_capable 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 find_cheapest_capable. 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.
find_cheapest_capable is provided by the Whichmodel- MCP server (which-model/whichmodel-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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